Thank you very much for choosing our theme and for contacting us.
Please deactivate all the plugins not related to the theme and switch the parent theme, check the issue, if the problem remains, leave the plugins not activated and provide the site admin access to the private area. Please provide the screens of the FB configuration into the private area as well.
It seems that Facebook is blocked your APP due to wrong buttons style. http://prntscr.com/nnhknx We have fixed this issue in our latest update and now you have an option to enable alternative social buttons style. You need to contact Facebook support and ask to unlock the App.
As for the Google, you have set a wrong redirect URL. You have HTTPS and there you have set HTTP.