Accessing Microsoft Teams using organizational or personal credentials
Dear D3p0,
Good day!
Thank you for posting to Microsoft Community. We are happy to help you.
i have done some reasearch regarding this situation.
From my findings, it is recommeded to follow the steps provided in this article
Teams web client is stuck in a login loop - Microsoft Teams | Microsoft Docs
Assuming that the situation persist,
Please let me know wich subcription and license are you using for Teams.
We look forward to your reply for further assistance. Thanks for your cooperation.
Sincerely.
Mac | Microsoft Community Moderator