We have a custom dylib (written in C++) integrated in a Unity project and works exactly as expected both in the Unity Editor (on Mac) and when loaded from XCode directly to an iPhone.
However, when trying to push this build to TestFlight, we're getting an error message from App Store Connect:
> ITMS-90426: Invalid Swift Support -> The SwiftSupport folder is missing.> Rebuild your app using the current> public (GM) version of Xcode and> resubmit it.
We tried practically every solution that comes up by googling for this error message, including (all of these didn't help), summarized here: https://docs.google.com/document/d/1SIAnJ_2Ktq2riatDcrfPs8WLlFYBtEJBaA1q8IkmvUg
Any ideas how to solve this?
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