Which is very odd as I'm using XCode 12.4, has anyone else experienced this issue and/or fixed it?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 13 SDK or later, included in Xcode 11 or later. Further, starting April 26, 2021 iOS apps submitted to the App Store must be built with the iOS 14 SDK or later, included in Xcode 12 or later.
There would normally have it actually tell you which SDK you built it with (e.g. "the iOS 12 SDK"). If it doesn't just try again. Hopefully they can resolve this soon, resending builds is tiresome.ITMS-90725: SDK Version Issue - This app was built with the iOS SDK.