Jul 30 2021
It is always a blank page using the sign-in option with teams using any app anyone has a solution for it
Jul 31 2021
Hello @ITSGUB There is a similar post on the Microsoft Answers.microsoft.com tech support site that may apply to your issue: Blank white login screen for any Microsoft login page (not in - Microsoft Community
If not, I suggest you open your own support ticket there, where authorized agents can troubleshoot until resolution.