Why I'm not getting my multiple brave ads?

Hello everyone!
I’m not getting my multiple brave ads why? Do you know about this issue? Are you facing the issue in your machine? I run my all multiple brave but I’m not getting ads, if i run brave the ads will i receive it’s work 1 month ago, but now it’s not working why? The issue working on 15 April, please help me or any suggest for this? I think You’ll understand the topics
Thanks