Receiving this error when trying to upload the app to Testflight. I've been able to successfully upload a few days ago, but it just started happening.
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I got "Error Finding App Store Connect Credentials" on Monterey with Xcode 14
Now on Sonoma with Xcode 15 the error message is different, any status ???
Same here. Guess the service issue from apple.
Open Xcode | Settings | Accounts and make sure your session isn't expired. Fixed it for me - Xcode 14