While waiting to start a session, Fortnite log is exploding up to 22.9GB from 10MB and then crashes. I can’t open the log file so I have no idea what is causing it. I can offer the project files up (which are checked in) if that helps…
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Stability
Steps to Reproduce
Just working on a project and it happens
Expected Result
log should not explode up to 20GB ever…
Observed Result
over 22GB log file created and fortnite hard crashes
I have narrowed it down to a prefab that has a verse component on it that is causing the issue. The code is quite simple and is common across our projects. Only difference in projects is that this one has sidekicks in it. Will update as I know more.
[2026.06.18-02.42.30:697][433]LogStreamableManager: Error: Encountered error: StreamableManager::AsyncLoadNotInstalled: [Async load failed because the package is not installed., (RequestedPackage: /CosmeticCompanions/Assets/Quadruped/FlourCut/Meshes/FlourCut_Quadruped_AnimBP, MissingObject: /CosmeticCompanions/Assets/Quadruped/FlourCut/Meshes/FlourCut_Quadruped_AnimBP.FlourCut_Quadruped_AnimBP_C), (RequestDebugName: , AttemptedDownload:false, RequestedAssets: [/CosmeticCompanions/Assets/Quadruped/Invis/FlourCut_Quadruped_Invis.FlourCut_Quadruped_Invis, /CosmeticCompanions/Assets/CompanionParts/FaceAcc/CP_Companion_FlourCut_Body.CP_Companion_FlourCut_Body, /CosmeticCompanions/Assets/Quadruped/FlourCut/Meshes/FlourCut_Quadruped.FlourCut_Quadruped, /CosmeticCompanions/Assets/Quadruped/FlourCut/Meshes/FlourCut_Quadruped_AnimBP.FlourCut_Quadruped_AnimBP_C, /CosmeticCompanions/Assets/Quadruped/FlourCut/Fur/FlourCut_FurData.FlourCut_FurData, /CosmeticCompanions/Assets/Items/Companion_FlourCut.Companion_FlourCut, /CosmeticCompanions/Assets/CAS/CAS_FlourCut_Emote.CAS_FlourCut_Emote, /Game/Characters/Player/Male/Medium/Bodies/M_MED_HighTower_Tomato_Casual/Materials/MI_VertexCrunch.MI_VertexCrunch])]
This is in the log an unending amount of times. We have the “flourcut” cat as a sidekick NPC in the game. This literally crashes fortnite after a bit of time as the log goes up endlessly.
This island is barely started for development, we don’t have an island code. Is there something else I can get? Really it’s a matter of putting a bunch of NPC spawners with sidekicks in them and just running a session. Should happen immediately.
I want to take a moment to reiterate that this does NOT happen when in game in a session, it happens when you end the game and sit in a session. So the game is not running at the time that this happens for some reason and happens while you’re working in UEFN and have a session in fortnite running connected to UEFN.
Another thing to note is that the pets don’t need to spawn in the game. It’s just simply having the spawners in the game that does this. The more you have the faster the log files go up and 30 will cause the log to go up about 1GB per minute. I have replicated this in a blank map, making 6 different definition files of whatever sidekick (doesn’t seem to matter) and then dragging those on to the scene, then duplicating those 5 times.
Then you just start a session, go in game, stop the game and then watch the log file go crazy. It’s irrelevant if there is custom verse behavior on the definition or in the NPC spawner. This is strictly a sidekick NPC spawner issue.
