Same issue when I disconnected the gemini wallet, successfully connected my uphold one again, but when I disconnected uphold to reconnect gemini, I got this.
yep. The gemini account is disconnected and when I try to connect it, the same dialog box appears. It probably has something to do with the latest update
Update Jan 25, 2022: Thank you everybody for your patience. We are working with the Gemini team to get everything back up and running. We currently expect Gemini user wallets in Brave Rewards to be back online around Feb 2-3, 2022 (next week).