Thanks for that @cse63. Earlier people were getting things like Region not supported or Limited Uphold account functionality, among other things. So it’s helpful to have more details. The particular error you’re getting is a bit more annoying as is a lot of possibilities.
Which OS are you using and which version of Brave? (often has been fixed via updating, but not sure if that’s going to be an issue for you)
Also might need to encourage you to create a Rewards Support Ticket at https://support.brave.com/hc/en-us/requests/new?ticket_form_id=360001302431 just so someone from Brave can look at your account and make sure it’s not an account related issue.