MetaHuman Hair and LiveLink Not Working in Build [UE5-0]

For some reason, LiveLink and MetaHuman hair related dependencies don’t seem to be properly included in the Windows build I create. I was able to recreate this issue using a new blank project, adding in a MetaHuman (exported at the lowest settings), updating the plugins/settings I was then prompted about, and then packaged the project for Windows using all other default settings.

I think these issues are related, as both seem to deal with missing dependencies the MetaHumans should include. I found a thread on the LiveLink issue, but the solution is to just remove the dependency on LiveLink, which is a pretty poor solution.
The relevant log issue for the LiveLink part is:

[2022.04.12-00.06.15:613][  0]LogProperty: Error: Struct type unknown for property 'StructProperty /Game/MetaHumans/Common/Face/Face_AnimBP.Face_AnimBP_C:AnimGraphNode_LiveLinkPose'; perhaps the USTRUCT() was renamed or deleted?
[2022.04.12-00.06.15:613][  0]LogWindows: Windows GetLastError: The operation completed successfully. (0)

The hair doesn’t cause a crash, but rather just doesn’t appear. In the editor, most of the hair appears, but some characters receive what resembles a giant salmon-colored afro.

The relevant issue in the log for that seems to be (it’s mostly 4 unique lines repeated with some slight variation):

[2022.04.12-00.06.15:609][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:609][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:609][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:609][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:609][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:609][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_1
[2022.04.12-00.06.15:609][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfacePhysicsAsset_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceVelocityGrid_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfacePhysicsAsset_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceVelocityGrid_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfacePhysicsAsset_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfacePhysicsAsset_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfacePhysicsAsset_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:610][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceVelocityGrid_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfacePhysicsAsset_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceVelocityGrid_1
[2022.04.12-00.06.15:610][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_2
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfacePhysicsAsset_2
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceVelocityGrid_2
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_2
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfacePhysicsAsset_2
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceVelocityGrid_2
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableRodsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Could not find class object for NiagaraDataInterfaceHairStrands_2
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) /HairStrands/Emitters/StableRodsSystem (0x753AD7EB84CEE2A9) - Skipped failed export NiagaraDataInterfaceHairStrands_2
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:611][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:611][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:612][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:612][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:612][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:612][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x35E5AE6F3EF6CCAF for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x2834FBA7D463BBEC for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfacePhysicsAsset_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfaceVelocityGrid_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing script import 0x2A766846835A709E for package /HairStrands/Emitters/StableSpringsSystem
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: Missing Dependency
[2022.04.12-00.06.15:613][  0]LogStreaming: Error: CreateExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Could not find class object for NiagaraDataInterfaceHairStrands_0
[2022.04.12-00.06.15:613][  0]LogStreaming: Warning: SerializeExport: /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) /HairStrands/Emitters/StableSpringsSystem (0xC99436E19541F293) - Skipped failed export NiagaraDataInterfaceHairStrands_0

I’ve found and posted a solution to this issue here.

The issue with the giant afro-like hair was an issue with using SetVisibility and propagating that to the hair components. Some of the hair has that issue when be toggled that way. SetActorHiddenInGame can be used fine instead.

In case anyone facing these issues also has the Assertion failed: Instance->Guides.DeformedRootResource->IsValid(MeshLODIndex) crash I have, hiding the actor and immediately unhiding it in the MetaHuman’s BeginPlay event fixes the issue.