App Engine (On Google Apps) Custom Domain can't remove

Question

I got the error when I click 'delete' for deleting Web address

We are unable to process your request at this time. Please try again later. (Error #1000)

and I got this error when I try to delete google app engine from Google Apps

You do not have the permissions necessary to uninstall this application.

Answer 1

Today problem gone after I email to support and post this issue =)