Ionic ios build fails, error archive not found : Error code 65 for command: xcodebuild with args

If you are working on ionic app, and you are trying to create iOS build then usually we use the following command:

ionic cordova build ios

OR

ionic cordova build ios --device --prod --release

while creating build if you get following error:

✖ cordova build ios - failed!

[ERROR] An error occurred while running cordova build ios (exit code 1):

        error: archive not found at path '/Users/work/MyApp/platforms/ios/MyAppp.xcarchive'

        ** EXPORT FAILED **

        CordovaError: Promise rejected with non-error: 'Error code 65 for command: xcodebuild with args: 

Then You have to use the following command:

ionic cordova build ios -- --buildFlag="-UseModernBuildSystem=0"

if this won't work then you can update and or create a build.json file.

{
    "ios": {
        "release": {
            ...,
            "buildFlag": [
                "-UseModernBuildSystem=0"
            ]
        }
    }
}

if this won't work then you can update and or create the build.json file.

xcode -> File -> Workspace Settings-> Legacy Build System