Can't package project for unknown cook failure

Thanks for the reply, I will look into it and see if I can fix the issue.

edit: So I can’t figure out how to fix the “0]LogInit:Display: LogPackageName:Error: DoesPackageExist: DoesPackageExist FAILED: ‘None’ is not a standard unreal filename or a long path name. Reason: Path should start with a ‘/’” do you have any advice how to start to look for this problem?