Hello
It was a post about some windows 7 bug, I can’t remember exactly.
Close brave browser, delete the client.json file, it will clear your 7 days ad-history (nothing to worry about, you can make a backup, I just delete that file from time to time), I’m 100% sure it’s just placebo.
AppData\Local\BraveSoftware\Brave-Browser\User Data\Default\ads_service > client.json
This is from an other topic, try do this and see if you will receive notification then
I had same issue, not receiving any bat, but with this worked