I built the app in xcode 11.0 so does not that mean it uses ios 13.0 sdk ? Does anyone on xcode 11.0 get this error ?
ERROR ITMS-90725: "SDK Version Issue. This app was built with the iOS SDK. All iOS apps submitted to the App Store must be built with the iOS 12.1 SDK or later, included in Xcode 10.1 or later. Further, starting April 30, 2020, new iOS apps submitted to the App Store must be built with the iOS 13 SDK or later, included in Xcode 11 or later.
I have a similar problem, after send to review received email with,
ITMS-90111: Invalid Toolchain - Your app was built with a beta version of Xcode or SDK. Apps submitted to the App Store must be built with the GM version of Xcode 10.1 and the SDK for iOS 12.1 and watchOS 5.1, Xcode 7.1 and the SDK for tvOS 9, or Xcode 6 and the SDK for macOS 10.9 or later. If you are using an Xcode beta version to test your app, make sure you are using the latest supported version. For more information about supported beta versions, view the App Store Connect What's New page (https://developer.apple.com/app-store-connect/whats-new/).
My Xcode version 11.4.1 (11E503a), MacOS version 10.15.4 (19E287