Processed internal TestFlight builds fail to install: “The requested app is not available or doesn’t exist”

Hi, I’m seeing a strange TestFlight issue.

My builds process successfully in App Store Connect, appear in TestFlight, and are assigned to internal testers, but installation fails immediately with:

“The requested app is not available or doesn’t exist.”

What I’ve verified: • builds are processed/completed • apps are visible in TestFlight • internal tester groups are configured • agreements/banking/tax are active

This affects multiple apps in the same developer account.

The issue started after adding a widget extension and moving to a new Swift-based workflow, so I’m trying to isolate whether this is: • signing/provisioning/entitlements • widget extension misconfiguration • or a backend issue on Apple’s side

I’ve already contacted Apple Developer Support and submitted Feedback Assistant reports.

Has anyone seen this exact behavior before?

Processed internal TestFlight builds fail to install: “The requested app is not available or doesn’t exist”
 
 
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