Unreal engine 5.1 crashes on startup

Development Programming & Scripting
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1

So I attempted to migrate some files from lyra starter game content such as animation and character rig into the game I’m making, I was able to get it to work and everything in my file but now I’m having issues on opening my file from UE application and show’s me this error.

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000084

UnrealEditor_Renderer
UnrealEditor_Niagara
UnrealEditor_Niagara
UnrealEditor_Niagara
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll

Please help, I really don’t want to lose my whole month of progress.

2

Un-migrate them and the issue should resolve itself. It is likely tied to the issue of some property trying to access another property. The issue also seems to tie in with the Niagara particle system.

3

Still didn’t work, Is there a way to open the project into safe mode so I can delete any changes inside the program?

4

This is why we use version control systems such as Git, P4, and Plastic.

5

Do you have a link on how to use version control systems? I’m still newish on Unreal so I’m still learning.

6

I suggest you have a look here: Collaboration and Version Control in Unreal Engine | Unreal Engine 5.0 Documentation