Integrity error 0x8000002 | how to fix?

First of all i have to say that i have no problem launching the game, this happened to my friend a few days ago and, based on the text below the error, we figured it was cause of reWASD so he deleted it and his game worked perfectly for like a week, up until today.

We tried everything, he streamed his screen on discord and we uninstalled everything that could cause a problem, like Vanguard, FaceIt AC, Voidemod...

We did everything we saw on internet, what else could be causing this problem?