I have my app approved and listed on Facebook for sometime already. Today, I try to enable iOS - iPhone, iOS - iPad, and Android in App Center Listed Platforms section to get Send to Mobile button on my app listing.
By default these buttons are disabled, I can't enable it. After I enable Single Sign On for iOS and Android on setting page, I am able to enable it. But as soon as I enable any of it, Facebook will display the following for my app:
Misconfigured App
Sorry, Myappname hasn't been approved for display in App Center.
How can I solve it?