Error when trying to download app

I could not download my app. I keep getting an error ( Oops something went wrong downloading your app)

there are some reasons that i face in the same situation;;

1.may be your app icon is not suitable for your app .Change your app icon and try again to download .
2. may be you left some undecided commads in block section .

Sorry about that – the full list of iOS download issues that we know about is here: