Hi @Beastusz,
It looks like your project failed when cooking for Linux, during asset validation. This can be caused by missing or corrupted files. If you can find any red erorrs on your output log, this might help indicate what particular assets are failing. Otherwise, the best way to check for the cause is to run a full asset validation check.
In your content browser, start by fixing any redirectors.
Then, run an asset validation.
If you’re lucky, it might just be as simple as a file path that is too long.
Good luck! Let me know if you need any more help.