I've been having essentially the exact same error all day today trying to validate a Cordova app that worked fine in the past. Here are the errors I'm getting: App Store Connect Operation Error Your app contains non-public API usage. Please review the errors, correct them, and resubmit your application. App Store Connect Operation Error The app references non-public selectors in Payload: applicationNameForUserAgent, initWithFrame:configuration:, isMainFrame, navigationDelegate, navigationType, setNavigationDelegate:, setProcessPool:, targetFrame, userContentController I've removed any suspect plugins down to the core plugins: Camera, Device, File, and Geolocation, which are all established plugins, but no matter what, the exact same errors above persist every time I submit the app from XCode for validation. And all versions and tools are up to date. If this is just a bug on Apple's side, I'll scream, as I've spent all day battling this error and can't find any way to fix it.

There's another thread with many people having the same problem, it's not just us: https://developer.apple.com/forums/thread/127678

Same here -- trying all day to fix it.. glad it's not just me! Here are the errors I'm getting: App Store Connect Operation Error Your app contains non-public API usage. Please review the errors, correct them, and resubmit your application. App Store Connect Operation Error The app references non-public selectors in Payload: applicationNameForUserAgent, initWithFrame:configuration:, isMainFrame, navigationDelegate, navigationType, setNavigationDelegate:, setProcessPool:, targetFrame, userContentController I've removed any suspect plugins down to the core plugins: Camera, Device, File, and Geolocation, which are all established plugins, but no matter what, the exact same errors above persist every time I submit the app from XCode for validation. And all versions and tools are up to date. Apple -- can I have a day's pay back that I've wasted on this?