Crash on Startup

Hi so basically I installed an asset that was apparently not compatible with my UE5 version and now my project keep crashing on startup and I need some help to fix the issue. Here is a copy of the crash report : UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll

that crash report mostly means: you don’t have the IDE solution files generated and parsed, and that the issue happened in UnrealEditor_Engine (and without line numbers that could be any one of a hundred things if not more)

-what was the asset you were trying to “install”?
-did this come from the Unreal Engine Market (the Epic Game’s launcher), GitHub, some separate asset pack, or somewhere else?
-how did you “install” it?

if the project is under source/version/revision control then you could be able to roll-back the “install”

if this is the most recent change then you could try to manually remove the asset files and see if the project launches (it might demand to be re-built so let that happen)

you could try to “rebuild” manually: right click the [ProjectName].uproject select “switch Engine Version…” then you can select even the same version of the Engine, this will re-build the project files. (this could make the previous option a lot harder as you might not be able to use the time/date indexes to figure out what was added to the files recently)