Cannot Download Store App

Trying to download this app: http://zipapp.co.uk/Application/Download/11802 as a store app. The Windows Phone one lets me download the .zip but for the store I get a message: "Error. An error occurred while processing your request."

Have read several similar posts and removed any images, URLs that might be blocking this. Even tried a new plain app with only a couple of pages and get the same error. Is it something to do with my account?

Thank you!