Still having a problem with build

Please, someone tell how to find out what is wrong so I can fix it.

Hi,

Have you been able to complete your build yet? Do you get an error message or Error unknown? In case of the Error unknown, can I get your app id so we can investigate it further?

I finally got the build completed. Apparently I did not have enough graphics. Why do you need so many in so many different sizes?

Great! The builds require graphics to suit every type of device and screen size, it is not a Composer specific requirement. You can search for some online icon generators that provide you with the correct sizes easily, so you don’t have to manually create each one.