CLO/Marvelous Designer LiveSync fails to send Metahuman avatar to MD

I am trying to use standard workflow for custom clothing for metahumans, as described by both CLO and by community guides here. However, the avatar fails to show in MD.

The sync is up, the plugin creates USD assets in Saved\LiveSync folder, but they don’t appear in MD and when manually imported, cannot be synced back to UE. The only issue I get in the log is bones missing, which is weird since I have not modified the standard metahuman skeleton asset. (You can see added socket in log below, but the result is the same before it’s added.)

Anyone with a similar issue or ideas on how to fix it?

Log          LogSlate                  Window 'CLOLiveSync Exporter' being destroyed
Warning      LogAnimationCompression   EnsureDependenciesAreLoaded: [ConditionalPostLoad Dependency] /Engine/Transient.AnimSequence_0:AssetImportData
Warning      LogTemp                   SkelSocket: Pistol
Warning      LogTemp                   SkelSocket: Pistol
Warning      LogTemp                   SkelMeshSocketCount: 0 | SkelSocketCount: 1 | Combined: 1
Warning      LogTemp                   SkelMeshSocketCount: 0 | SkelSocketCount: 1 | Combined: 1
Warning      LogTemp                   Found Duplicates: False
Log          LogSkeletalMesh           Building Skeletal Mesh SkeletalMesh_1...
Display      LogSkeletalMesh           Waiting for skinned assets to be ready 0/1 (SkeletalMesh_1) ...
Log          LogSkeletalMesh           Built Skeletal Mesh [0.04s] /Engine/Transient.SkeletalMesh_1
Log          LoadErrors                The Skeleton  Skeleton_0 is missing bones that SkeletalMesh  SkeletalMesh_1 needs. They will be added now. Please save the Skeleton!
Display      LogAnimationCompression   Building compressed animation data for AnimSequence /Engine/Transient.AnimSequence_0 (Required Memory Estimate: 3.36 MB)
Display      LogAnimationCompression   Storing compressed animation data for /Engine/Transient.AnimSequence_0, at AnimationSequence/c0edb97be7849052ad2272fde4983a05fdc208b8
Log          LogAutomationController   Ignoring very large delta of 2.15 seconds in calls to FAutomationControllerManager::Tick() and not penalizing unresponsive tests