Error: app is not a valid binary after upload to TestFlight

Hello,

I have a working App which archives and distributes ok. However I receive a message in Xcode (15.2) after a few minutes saying app "is not a valid binary". The app is not added to available Builds in TestFlight on App Store Connect.

Is there a way of finding out what is going on ? or a likely reason for this error ?

Thanks

As a starting point, can you post a screenshot of the exact error message?

It's a notification in the top right corner of the screen that appears a few minutes after upload.

Apart from the fact that the build does not become available in App Connect, that's the only info.

Screenshot attached.

Any info on this problem ?

Bearing in mind that the app runs on multiple versions of iphones, and passes the app connect validation ("Your app successfull passed all validation checks") what could possibly be causing this error after upload ??

Error: app is not a valid binary after upload to TestFlight
 
 
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