TestFlight Installation Fails for All Apps in Account (“App Not Available” Error)

Hello,

I’m experiencing a serious issue with TestFlight.

I correctly set up internal testing:

•	Added testers via email
•	Assigned builds
•	Everything shows as “Ready to Test”

However, when trying to install via TestFlight, I get:

“App Name couldn’t be installed” “The requested app is not available or doesn’t exist”

⚠️ Important note: This issue is NOT limited to a single app. It happens across all apps in my account.

So it does not seem to be app-specific.

What I’ve already checked:

•	Agreements, Tax, and Banking are completed
•	App Privacy is fully filled
•	Builds are successfully uploaded and selected
•	I am correctly added as an internal tester
•	Tried logging out/in of TestFlight
•	Reinstalled the app and TestFlight

I contacted Apple Developer Support twice but received no response.

Has anyone experienced this issue affecting multiple apps? Any help or guidance would be greatly appreciated.

Additional technical details:

• Developer Account Apple ID: yilmaz34muhammed(at)icloud.com

•	App Store Connect App ID: 6762088121
•	Bundle ID: com.devyilmaz.TahlilAI
•	Build Version: 0.2.0 (1)

This issue occurs across all apps in my account.

TestFlight Installation Fails for All Apps in Account (“App Not Available” Error)
 
 
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