Same issue here. I noticed it today as I was about to submit a build to Test Flight. I've also sent off a support email to hopefully get more notice. This seems to be a backend issue.

I received a support response with a generic "have you looked at our code signing help documents" response. I have pushed back in my response explaining this is either a bug with Xcode or their backend.

Attempted upgrading from 14.0 to 14.0.1. No change. Support ultimately told me to use Feedback Assistant, so I've submit a request in there as well.

I can also confirm it happens on every computer I have Xcode installed on. It's something specific with the account, as my other accounts in Xcode load just fine.

As of right now, this seems to be working again. I was able to load my profile in Xcode Preferences and submit builds directly to App Store Connect.