Can't disable Sandbox mode in Facebook application settings

I created a Facebook app in http://www.facebook.com/developers/ to get an Application ID, following the instructions given here. I tried to disable Sandbox mode, which seems to only authorize the developper to login to the app, but I get

Validation failed.
Tried to switch out of sandboxed mode while still using an FBML Canvas. Need to switch to an IFrame Canvas before disabling sandbox mode.

What's wrong? I only set the name of the app and the android hashkey. Do I have to set something else (开发者_开发知识库like Facebook Integration settings)?

Thanks

Note that only admins of an app are able to enable/disable sandbox mode. Developers and others will find that setting grayed out.

Jeremy

Try switching the app into sandbox mode then save it. Disable deprecated FBML and sandbox mode and then save it again.

I think I was able to "fix" this issue by adding another FB Administrator for the app then going to that account and Reseting it out of sandbox mode. Hope this helps others.

That was a bug on the creation page of a facebook application.