Warning: Undefined variable $wfLoadExtension in /var/www/html/LocalSettings.php on line 155

Fatal error: Uncaught Error: Value of type null is not callable in /var/www/html/LocalSettings.php:155 Stack trace: #0 /var/www/html/includes/Setup.php(213): require_once() #1 /var/www/html/includes/WebStart.php(73): require_once('/var/www/html/i...') #2 /var/www/html/index.php(36): require('/var/www/html/i...') #3 {main} thrown in /var/www/html/LocalSettings.php on line 155