What does "Failed to open descriptor file ../../../Marvel/Marvel.uproject" mean & how to fix it?

[derynjohnson]

Just downloaded the game, this error keeps on popping up, don't know what the issue is. Any help would be much appreciated. Thank you.

[Arc]

Your files are corrupted so verify game files in Steam.
If it won't help check if your antivirus is not blocking the game.

[orthostatic]

Yeah that's a straight up denial from the OS to the process saying "this file ain't opening so you can't have it". If you have some weird cloud storage crap going on you might want to rethink how you arrange your files.

If you have an old SSD it might be time to use the vendor's health-check tool on it; you might've beaten it beyond submission.