In Ember.js IOS Cordova Building App Not Working?

when I add the ios platform in ember.js by using cordova comand.

• ember cdv:platform add ios

Adding platform in my project is ok.

Then I tried to build by using this command.

• ember cdv:build --platform=ios

Now showing error. I tried a lot of things and by using this command too.

• ember cdv:build --platform=ios --buildFlag='-UseModernBuildSystem=0'

Not working.

Error showing this only.