Hello,
After a year without any problems finally come across one.
It is more than 2 months that I haven’t received any ad.
I tried the following:
-reactiving Brave rewards
-uninstalling plugins
-clear browser data
It will be great if someone has a solution
Thank you !
I think is a technical issue ,may you please try to talk to the technical staff. 
Thank you for your response how should I contact them?
Hello!
Just consult a technical section,and write your issue there. 