Cannot install build from Testflight.

We are experiencing an issue with our TestFlight build

The build was successfully uploaded to App Store Connect and is available for internal testing. Our internal testers can see the build in TestFlight, but when they attempt to install it, they receive the following error:

"Could not install Game. The requested app is not available or doesn't exist."

This issue occurs for all internal testers. The build upload completed successfully, and the build is assigned to the internal testing group.

We are unable to determine the cause of this issue. Could you please help us identify whether there is any missing configuration or any other requirement that could be preventing the app from being installed?

I have the exact same issue with 3 different apps.

Cannot install build from Testflight.
 
 
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