same here, this didn't start for us until today - no library/pod changes and all of the sudden apple is complaining about methods/selectors that are being used by pods we've used for years and successfully submitted app review ITMS-90338: Non-public API usage - The app references non-public selectors in XXXXXXX: estimatedProgress, initWithFrame:configuration:, isMainFrame, navigationType, newSocketQueueForConnectionFromAddress:onSocket:, onSuccess:, setNavigationDelegate:, setProcessPool:, socket:didAcceptNewSocket:, socket:didConnectToHost:port:, socket:didConnectToUrl:, socket:didReadData:withTag:, socket:didReadPartialDataOfLength:tag:, socket:didReceiveTrust:completionHandler:, socket:didWriteDataWithTag:, socket:didWritePartialDataOfLength:tag:, socket:shouldTimeoutReadWithTag:elapsed:bytesDone:, socket:shouldTimeoutWriteWithTag:elapsed:bytesDone:, socketDidCloseReadStream:, socketDidDisconnect:withError:, socketDidSecure:, targetFrame, userContentController, websiteDataStore. If method names in your source code match the private Apple APIs listed above, altering your method names will help prevent this app from being flagged in future submissions. In addition, note that one or more of the above APIs may be located in a static library that was included with your app. If so, they must be removed. For further information, visit the Technical Support Information at http://developer.apple.com/support/technical/