Hi team, one possible issue here might be insufficient access roles.

We have a Databricks account on Google Cloud, and used a service principal to create a workspace in that account. Our user accounts are account admins, and we got stuck in a similar auth loop when trying to login to the workspace, even though we could access the account.

Fix was to simply add ourselves as workspace admins in the account console. It seems there just isn't an error message if you try login without sufficient permissions on the workspace.

OP mentioned that he is having trouble logging into the account not a workspace, in that case this fix may not be the true issue, but hopefully this helps someone with a workspace-related login loop.