After I updated the brave browser, my monthly brave earned disappeared, then after I connected to Gemini, my entire BAT earned disappeared too 
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!