No BAT Rewards since May '21 on a Mac

Hello,

I have not seen any ads appear as pop-ups while using Brave since May. It worked from March-May, but has not worked since then. I have notifications enabled, and run the notifications test to ensure that is all working. I am running the following version of Brave:
Version 1.31.88 Chromium: 95.0.4638.69 (Official Build) (x86_64)

And I am running macOS Big Sur version 11.5.2.

Is anyone else experiencing this issue? Or know of any fixes?