Fatal error: Uncaught TypeError: Argument 1 passed to WP_Translation_Controller::set_locale() must be of the type string, null given, called in /home/customer/www/fernieweb.com/public_html/wp-includes/l10n.php on line 799 and defined in /home/customer/www/fernieweb.com/public_html/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /home/customer/www/fernieweb.com/public_html/wp-includes/l10n.php(799): WP_Translation_Controller->set_locale(NULL) #1 /home/customer/www/fernieweb.com/public_html/wp-includes/l10n.php(1005): load_textdomain('sitepress', '/home/customer/...', NULL) #2 /home/customer/www/fernieweb.com/public_html/wp-content/plugins/sitepress-multilingual-cms/sitepress.class.php(3463): load_plugin_textdomain('sitepress', false, 'sitepress-multi...') #3 /home/customer/www/fernieweb.com/public_html/wp-includes/class-wp-hook.php(324): SitePress->plugin_localization('') #4 /home/customer/www/fernieweb.com/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #5 /home/ in /home/customer/www/fernieweb.com/public_html/wp-includes/l10n/class-wp-translation-controller.php on line 87