Same problem here. I was pushing app updates (small incremental changes) to testflight. I didn't do any change in packages. I was pushing OK until some time today.
The exact wording of the error message:
The app references non-public selectors in Payload/App.app/Frameworks/Capacitor.framework/Capacitor: __swift_objectForKeyedSubscript:, applicationNameForUserAgent, initWithFrame:configuration:, isMainFrame, setNavigationDelegate:, targetFrame With error code STATE_ERROR.VALIDATION_ERROR.50 for id 24e410ba-55a9-443c-bc9a-0e20ae7f76b2
Also the app validates just fine.
therist
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