Blank login window - Fix it!
When I open the Teams app on my machine (Windows 8.1), I get a blank login window. I've tried completely uninstalling it and reinstalling it and the problem remains. My company's IT people can't figure it out either. The only way I can get it working is to close the blank login window, then it reappears, then I close it again and it says "Modern authentication failed here. Status code 4c7". Then it logs in some other way and works.
How do I fix this?
After trying many things from this video on youtube and nothing working. I tried Erwan's suggestion and it worked! Thank you Erwan!
Problem comes from my GPU. Tried many times ton uninstall and install again Teams but never worked fine.
Deleted Teams folder in APPDATA, but didn't fix at all.
I solved the problem by editing the desktop-config.json file in Teams Appdata\Roaming folder and changed parameter regarding GPU from false to true:
Launch Teams and it works perfectly.
It doesn't try to use GPU and it's a bit annoying.
Just to add my way of fixing this in my organisation.
1. Go to Win 10 Settings
2. Click Accounts
3. Click Access Work or School
4. Add users workplace or school account
After that it works perfect for us.
Sagar Patil commented
but why is microsoft not doing anything to fix it
1. Right Clicked Teams Icon in task tray and set to not start on startup
2. Right click/Sign Out from Teams on taskbar
3. Right click/exitTeams from taskbar
4. Uninstalled Teams Machine Wide installer
5. Ran uninstaller for Microsoft Teams, let sit for 10 minutes but it didn't seem to do anything
6. Rebooted computer
7. Deleted entire %appdata%/Microsoft/Teams folder
9. Downloaded/reinstalled Teams
10. Launched successfully! Disabled GPU acceleration in Teams > Settings to be safe
Thanks Chris Lange! Your solution worked for me :-)
When you load up Microsoft Teams and the start screen asks you for your email address only before asking you to login, enter the wrong email e.g. if it's firstname.lastname@example.org make it email@example.com and because that isn't a cached credential it's forced to prompt you for new creds.
Thank you so much Jan Gunnar Helgaland, your solution helped.
Henrique Machiavelli commented
Delete c:\users\<username>\AppData\Roaming\Microsoft\Teams worked for me too
I rolled out Teams to 40 users, all fine and working. All are on windows 10. in the last week 2 users reported exactly the same issue on the same day, i.e. when teams is loading but hangs at the initial screen showing a blank white screen. After uninstalling, reinstalling exactly the same. The web version loaded fine & both had the mobile version (android) working.
I followed Matthew's advice as well as checking internet explorer security level and both are now working.
Oussama Janah commented
Aniket Garg's comment solved my problem after struggling for a week with the same issue
Shidoshi Tanaka commented
I experienced this with a user. In my case I just let MS Teams go crazy by allowing it to try and load and fail by itself. After about 3 attempts of it trying to load by looping between the splash screen and then a blank white screen it presented me with options to either retry or sign out. Opted to sign out then just signed the user back in by manually entering his\her username and password, and... Tada! MS Teams loaded fine. That's just my exprience in my Enterprise environment for this particular issue. Now how do you like them apples?
Scott Lee commented
Aniket Garg's solution worked for me. Having my work software depend on the security settings of an unused internet browser is probably not a great idea, Microsoft.
Chris Lange commented
Thank you so much Matthew Arruda! Your comment helped me fix this problem!!
Jan Gunnar Helgaland' s comment on deleting Shutdown teams.exe from task manager. Delete c:\users\<username>\AppData\Roaming\Microsoft\Teams worked for me
David McDaniel commented
Added the work account like Matthew stated. Fixed my problem. Thanks much!
Aniket Garg commented
If anyone is still having problems, here's how I fixed it after banging my head against the wall for an hour and a half:
This sort of practice is really dumb and is exactly what got Microsoft fined years ago, but it is what it is.
Jan Gunnar Helgaland commented
Here is what worked for me having the same issue.
Shutdown teams.exe from task manager. Delete c:\users\<username>\AppData\Roaming\Microsoft\Teams
same problem here no MFA
Matthew Arruda comment helped me fix my problem