Fatal error: Uncaught Error: Class 'ComposerAutoloadClassLoader' not found in /var/www/html/w/vendor/composer/autoload_real.php:38
Stack trace:
#0 /var/www/html/w/vendor/autoload.php(12): ComposerAutoloaderInit_mediawiki_vendor::getLoader()
#1 /var/www/html/w/includes/Setup.php(107): require_once('/var/www/html/w...')
#2 /var/www/html/w/includes/WebStart.php(89): require_once('/var/www/html/w...')
#3 /var/www/html/w/index.php(44): require('/var/www/html/w...')
#4 {main}
thrown in /var/www/html/w/vendor/composer/autoload_real.php on line 38