iOS 6 the facebook server could not fulfill this access request invalid application

Question

In some iPhone 5 devices we have an error when trying to call Facebook login:

The error is: \"the facebook server could not fulfill this access request invalid appli

Answer 1

All developers of a particular app, should be known to Facebook. While the application is in Sandbox mode (i.e. developer only access), all every user who want to use the Facebook platform, for testing/developing the application, will have to be added as a developer (as shown below) -

Just goto https://developers.facebook.com/apps/, and add the user, in the list of developers/admins.