Maybe I can help. It happens because in recent updates property $version (among others) of class Redux_Extension_Abstract has strict type defined as string and in your child class Redux_Extension_Tabbed this is not present and PHP reports an error. Go to /home/nnwgyinw/public_html/wp-content/plugins/pe-core/redux/extensions/tabbed/class-redux-extension-tabbed.php on line 21 and add word string in front of $version so it becomes public static string $version
