Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in /home/mfefit/public_html/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php:17 Stack trace: #0 /home/mfefit/public_html/wp-settings.php(286): require() #1 /home/mfefit/public_html/wp-config.php(149): require_once('/home/mfefit/pu...') #2 /home/mfefit/public_html/wp-load.php(51): require_once('/home/mfefit/pu...') #3 /home/mfefit/public_html/wp-blog-header.php(13): require_once('/home/mfefit/pu...') #4 /home/mfefit/public_html/index.php(27): require('/home/mfefit/pu...') #5 {main} thrown in /home/mfefit/public_html/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php on line 17

Fatal error: Uncaught Error: Call to a member function set() on null in /home/mfefit/public_html/wp-includes/l10n.php:861 Stack trace: #0 /home/mfefit/public_html/wp-includes/l10n.php(964): load_textdomain('default', '/home/mfefit/pu...', 'hu_HU') #1 /home/mfefit/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /home/mfefit/public_html/wp-includes/l10n.php on line 861