This is controlled by a setting in the Facebook developer area. Go to developers.facebook.com/ and open your app. In Settings > Advanced, enable the 'Allow API Access to App Settings' option and save."Facebook API Error: (#10) Changing app settings through API calls has been disabled for this app. Go to your app's advanced settings to enable this.
Facebook Application configuration could not be loaded. Please check your App ID and Secret Key"
In the same Developer area, go to App Review tab. At the very top, switch the setting "Make XXYYZZ public?" to Yes. This will take it out of developer mode and set it live.I did a test and the pop-up login window says "still in developer mode."
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