@Bugra I think is correct. You should still be receiving ads, you just can’t connect to your custodial account at this time.
For anyone not receiving ads, you should probably disconnect from your custodial account and return to an unverified Rewards state until the issue is fixed. Make sure to back up your Brave-Browser folder in the interim just in case something happens and you need to restore your unverified Rewards balance.
Once you disconnect, clear history/cache, close browser, and reopen. You may have to wait a while before you receive ads again.
If you have already disconnected from your custodial account and are still not receiving ads, check these articles and topics to see if you can troubleshoot your issue:
Questions Answered: What about those Ads!?
Brave Ads FAQ
Why don’t I see any Brave Ads after enabling them?
Catalog Viewer Plus Explained
Unusual activity in active campaigns in my region - #2 by Saoiray
Unusual activity in active campaigns in my region - #3 by Saoiray
Older post, related, with other useful info from @Saoiray.
Not earning rewards for ads
Discussion Topic: What determines the number of ads per hour