I am trying to upload my App on Apple store. But app got rejected with reason non-public APIs.Whole reason for rejection is given below:

Dear Developer, We identified one or more issues with a recent delivery for your app, "AppName". > Please correct the following issues, then upload again.

ITMS-90338: Non-public API usage - The app references non-public symbols in Frameworks/Flutter.framework/Flutter: _ptrace. 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/

I tried many times but got same error message. If anyone solve this problem please help.

Solution 1: Kolineal

It looks like you are submitting a debug build. You can find discussion of the same problem here.

Did you copied the build after running flutter run?

Or you might have missed flutter build ios --release