After you click on continue, does it loop.
If it loops, follow this guide- “Go to Uphold.com and log in independently of the Brave Rewards verification flow. Once logged in, go into Brave Rewards and verify wallet. Follow steps Wallet verification should be successful (in “Wallet verified” state)”
(meaning login in uphold first and then click on continue)
If you have new devices, reset a device or reinstalled Brave at some point, you have probably reached your maximum number of wallets allowed. You’ll need to submit a request to un-link a wallet. Try the link below to submit a request. The second link has screen shots to help.