Unable to join Teams video Meeting Macbook

I'm using Microsoft Teams app on early 2015 Macbook Pro running Monterrey OS. Unable to join a video meeting with 3rd party. App gives me error The account you're using doesn't have access to this meeting due to org policies. Use Teams on your browser to join without using an account." When I try the browser version it wants to log automatically into an older account (not the one on the invite). I log out and it immediately logs me back in to the older account. I can't make the web version give me a non logged in state or log into the newer account.

The invite is on my gmail account and is synced to both Apple Calendar and Outlook Calendar. I thought that would make the invite populate to Teams Calendar but no luck. Don't know if that would solve it anyway.

I'm at my wit's end. Please help. 😞