When trying to run the project, "Unhandled Exception: EXCEPTION_ACCESS_VIOLATION"

[BRGEzedeRocco]

Hello @Inngvarr
It seems the error is related to a mesh. If you recently imported one, that’s likely the cause.
Try deleting it from your project to see if the editor opens without crashing.

I also found a similar post where the issue was caused by corrupted or misconfigured LODs.

500×500 2.84 KB

SOLUTION: On a long shot I started opening every single skeletal mesh from the content browser and I found two that crashed… the ONLY thing special about these two is they were background LOD versions of skeletal meshes that had their LOD0 capped at 25% deleting these meshes manually in windows explorer and recreating them in the content browser fixed the levels not opening issue. This worked for me after much trial and error troubleshooting.

If that doesn’t fix it, try the following:

• In the Epic Games Launcher, select Verify on the Unreal Engine version you’re using. This will repair any corrupted engine files.
  
  
• Delete the Saved and Intermediate folders from your project. When you restart the editor, Unreal will rebuild all temporary files and shader caches from scratch.
  
  

Hope it helps!