Not getting ads or rewards on my laptop, W10

I use brave as my default browser for quite some time now but a few days ago i decided to try brave rewards. The problem is that I don’t get any ads on my laptop. I synced it with my android and I get ads on my phone but still not on my laptop. Can you give me the solution for this problem? Also when I posted this I got a notification from brave like popup but when i click on it nothing happens…