You must select at least one of the listed platforms to display

Question

I am creating a simple application, I get this error when trying to save changes:

"You must select at least one display platform."

see screen shot here:

http://panstickers.com.au/webimages/fb_error.gif

I tried Google but could not find anything. Please, help.

Many thanks

Answer 1

According to: http://developers.facebook.com/docs/guides/appcenter/

First you need to go to the settings page and specify one of the options below with marks.