"TestFlight is currently unavailable, try again later." on all our managed devices

I work for a company in Germany and Testflight works on none of our managed devices. On all of them we get "TestFlight is currently unavailable, try again later.". On personal devices TestFlight works as normal and on https://developer.apple.com/system-status/ we saw nothing for Testflight.

Is there a way to fix this? What can we do to get Testflight running?

Thanks for this, there is a thread about this subject https://developer.apple.com/forums/thread/773818

Thanks, Albert Pascual
  Worldwide Developer Relations.

"TestFlight is currently unavailable, try again later." on all our managed devices
 
 
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