Update: This issue has recurred. A new build expired on its own with ~85 days remaining, and uploading a new build now fails again with "There was an error processing your request. Please try again later." Both internal and external TestFlight are blocked. Support case 102920138778 (previously escalated) reopened. Has anyone found a permanent fix, or is this a known recurring backend bug?
Topic:
App Store Distribution & Marketing
SubTopic:
TestFlight