settings - “Screen overlay detected” dialog? Turned off everything, doesn't work

I started receiving the “Screen overlay detected” dialog when trying to change apps settings.

Tried to turn off all "draw over other apps" as it says here - "Screen overlay detected" dialog?, first without system and then with, but it still doesn't work.

Then, I restored apps to original settings and it just made a bigger mess, dialog continue appearing. Any way to go back to previous settings???