Your Xcode version may be too old for your iOS version

Question

I have updated my phone's OS version to iOS 14 and spent today updating Xcode to version 12, yet when I try to build my Flutter app on my iPhone 11 - iOS 14 through Android Studio, it gives me this error:

Your Xcode version may be too old for your iOS version.
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2020-09-18 19:14:26.576 ios-deploy[30916:201883] [ !! ] Error 0xe8000022: The service is invalid. AMDeviceSecureStartService(device, CFSTR("com.apple.debugserver"), NULL, &con)
Could not run build/ios/iphoneos/Runner.app on 00008030-00012C200C45802E.
Try launching Xcode and selecting "Product > Run" to fix the problem:
  open ios/Runner.xcworkspace

Error launching application on Azheen’s.

Answer 1

This problem is somewhat confusing, I got the same error with Xcode 12.0.1 and iOS 14.2 beta. This solved for me

Download Device support files of iOS 14.0 from this link.

for iOS 14.2 beta there is a pull request that is not yet merged

1. Unzip and Paste it in this location. /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/

2. ReOpen Xcode.

Answer 2

This is what I did:

1. Updated Xcode
2. flutter clean on the terminal.
3. flutter upgrade on the terminal.
4. Open Xcode and run the application once.
5. flutter clean again.
6. flutter run.

It should work now.

Answer 3

This issued was raised a while back in August in the flutter repo. Currently, the issue has been fixed by the recent flutter update.

Run flutter upgrade to v1.20.4 to get the fix