Yeah, that’s likely a big issue. 1.33.106 would have been a while back in 2021. It’s had a few updates since, which can cause problems.
Beyond that, I’d make sure you’re checking the article John mentioned. There’s lots of things that can interfere. Overall though, if you’re experiencing issues with Rewards and those updates & basic troubleshooting from the Help Guide linked to you doesn’t work, then I’d suggest you DM @Mattches with your Wallet Info found at brave://rewards-internals as well as a description of the issue you’re having and what you’ve tried doing to resolve it.
Whatever you do, don’t uninstall/reinstall Brave. You’ll lose any BAT you have saved in your browser. Also be advised that Brave Support has had a lot of requests and issues they are handling, so there’s a delay in response. So don’t be surprised it if takes a little time to have them respond or help fix your issue.