Fatal error: Uncaught Facebook\Exceptions\FacebookSDKException: Required "app_id" key not supplied in config and could not find fallback environment variable "FACEBOOK_APP_ID" in /homepages/9/d526728351/htdocs/wp-content/plugins/nextend-facebook-connect/Facebook/Facebook.php:139 Stack trace: #0 /homepages/9/d526728351/htdocs/wp-content/plugins/nextend-facebook-connect/nextend-facebook-connect.php(160): Facebook\Facebook->__construct(Array) #1 /homepages/9/d526728351/htdocs/wp-content/plugins/nextend-facebook-connect/nextend-facebook-connect.php(123): new_fb_login_action() #2 /homepages/9/d526728351/htdocs/wp-includes/class-wp-hook.php(286): new_fb_login('') #3 /homepages/9/d526728351/htdocs/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #4 /homepages/9/d526728351/htdocs/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #5 /homepages/9/d526728351/htdocs/wp-login.php(446): do_action('login_init') #6 {main} thrown in /homepages/9/d526728351/htdocs/wp-content/plugins/nextend-facebook-connect/Facebook/Facebook.php on line 139