On the iOS App Version page in App Store Connect, clicking Save shows an exclamation-mark error icon on the button, but no error message or field-level validation appears anywhere on the page. The Add for Review button stays greyed out, so I can't submit. This happens on every new version.
What I've verified:
• Build is attached and shows "Validated" in TestFlight, no warnings or compliance issues
• All required metadata populated: Description, What's New, Keywords, Support URL, Marketing URL, Copyright, Version, Sign-In Information (working credentials), Contact Info
• Export compliance answered
• Release set to "Manually release this version"
• Screenshots present for iPhone 6.5" (same assets that worked on a prior version)
• Media Manager shows no warnings on any size
• Account has the Account Holder role
• Reproduced in Chrome (latest) and in Incognito
Observation: on clicking Save, the screenshots section briefly refreshes/reloads, then the error icon appears on Save. No other error is surfaced anywhere.
Current workaround: my engineer uploads the build directly from Xcode to App Store Connect, which lets the version through - but the web Save/submit path is broken on every release.
Question: what validation is failing here without being surfaced in the UI, and how do I get the web Save/submit flow working so I don't have to fall back to a manual Xcode upload each release?