Unable to claim rewards on Ubuntu, claim button unresponsive

Briefly describe your issue:
I am unable to claim my Brave Ads rewards on Ubuntu: the claim button is clickable but unresponsive, nothing happens when clicked and nothing is printed to console (sorry for the bad quality picture).
Before this happened I had the same problem described in this thread, i.e. there was no “+X BAT arriving in X days” banner in the browser while waiting for payday to arrive. It might be related.

What Operating System and Brave version are you using (Menu --> About Brave)?
OS: Ubuntu 20.04
Brave: Version 1.31.88 Chromium: 95.0.4638.69 (Official Build) (64-bit)

Is your browser wallet currently verified? (yes/no)

What date did you verify your wallet?

Have you been able to successfully receive payments in the past?
Yes, I was able to claim rewards in the past.

Are you using a VPN? (yes/no)

Are you in a supported region (see here for list of supported regions)?

Have you manually turned off Auto-contribute on all of your devices linked to Uphold??
N/A, not linked to Uphold.

Thank you for reporting! Please DM with the following information:

  • Copy/paste your Wallet ID (found on brave://rewards-internals)
  • Your OS and Brave version (first three lines in brave://version)
  • A screenshot of your Rewards panel in Settings --> Brave Rewards.

This will help to speed up the troubleshooting. Thank you in advance!