UnrealEditor keeps 4.26.2 keeps crashing on startup while loading assets, says "assertion failed"

Development Pipeline & Plugins
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1

Im using the version of the unreal editor that is used for the Mechwarrior 5 mod editor, which is 4.26.2.

For some reason, i am now constantly getting this crash after i start the editor. The editor starts fine and then it automatically starts loading assets. It will then crash with about 1664 assets left.

Assertion failed: Linker->AsyncRoot == nullptr || Linker->AsyncRoot == this [File:D:/Projects/Editor/Engine    /Source/Runtime/CoreUObject/Private/Serialization/AsyncLoading.cpp] [Line: 5816]
UE4Editor_Core
UE4Editor_Core
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll

Oddly, it only crashes while loading assets if my main mod is set as the active mod. If i set an empty mod as the active mod, the editor will not crash while loading assets. I can then set my main mod as the active mod and the editor will work fine.

Does anyone know what this assertion failed means?

2

Hey, did you manage to fix this issue?

I’m having the same issue, closed my project and everything was just fine. Now it crashes with this exception.