Why am I seeing ads with Brave?

I wanted to use the Brave browser to stop seeing ads but obviously the ad blocker in my version of Brave isn’t working anymore. When I started using Brave, where there were supposed to be an ad on the site I was on, it was just a blank space with the heading “Place For Ad.” Not anymore. Now the ads are there. Any way to turn the ad blocker back on?

@Stoner

Are you using Brave Rewards?

Anyway, @fanboynz (Brave Support) may be interested - given that you are suddenly seeing ads.