Hello, after doing some co op missions i got a warning about using third party apps, this didn't happen before
I have never seen this suspension warning (not a ban warning, don't worry) with the mod menu together before.
Can you confirm which apk is this, <linking> or <mod>? And what kind of data link are you using? FB, Play or Klab ID?
If this is <linking> apk, then you simply need to patch <mod> apk over <linking> apk. Install it like you do an update. Check permissions again, and try opening the app. You are supposed to play on <mod> apk, <linking> apk is just there to help you sign in only.