i am not able to sign into microsoft acct on lumia 950xl windows 10 mobile

[Andy Wall1]

The function to sign is just not available. Clicking sign in either does nothing or displays a blank screen

 

[Indistinguishable]

The function to sign is just not available. Clicking sign in either does nothing or displays a blank screen

I've seen this before. Give it a soft reset and it should fix up the issues.

To do a soft reset, simply hold down the power button until the phone vibrates and restarts itself.