@tsepash There’s a long list of things that can cause issues. I kind of tossed a bunch of it together under What are things that can interfere with Brave Rewards? at PSA: User FAQ - Support & Answers if you want to check all of that.
I guess one of the bigger things I’d ask is if you made any changes on your device lately? Also, have you used a VPN or Proxy server? A lot of times issues we see are from people using those or changing their language/region on their device, as it gets flagged as if they are trying to bypass regional ad restrictions. Doesn’t mean it’s what happened with you, just is what I am starting to see as the more common reason.