If you changed your Office password or logged with multiple Office accounts in the system. You may face this.
Even though you hit on “Login Now”, it comes to same screen. No Options! You not allowing to sign in or not allowing you to do anything other than hitting on login.
You could try kill the app (in “task manager”) but still its same.
Until Microsoft finds proper way to handle this dead lock, you could try below solution.
Right click on Microsoft teams task manager icon and hit on ‘Log out’ then login again.
You good to go!