Facebook OAuth (FBOAuth) fails to login
For its functionality you need to follow these steps: 


Make an Application on Facebook.
Visit https://developers.facebook.com/apps/ and create a new application.
While making the application on Facebook don't forget to disable the Sandbox Mode.
Add a Website domain name on which you want to use the fboauth login button.
From there copy the  App. ID and App Secret to /admin/config/people/fboauth


That would work for you.