Restarting Xcode worked, but had to kill the entire app not just the current window.
Andrej8888
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Also, have the same issue, problem is that I can't use Fastlane to generate certificate and provisioning profiles now and my colleague tester needs a provisioning profile for his new device. Tried all the suggested tips but nothing worked. I even went as far as to add my personal Account as admin and the issue was there as well. Then I deleted my account from AppStore, readded it using my personal account, and still the same. Needless to say checking and unchecking automatic signing, deleting the account, deleting derived data, restarting computer. All done and nothing. I'm getting desperate here.
Happening to me too :(