Warning: require(/usr/local/www/mediawiki/vendor/composer/../../extensions/Validator/Validator.php): Failed to open stream: No such file or directory in /usr/local/www/mediawiki/vendor/composer/autoload_real.php on line 45

Fatal error: Uncaught Error: Failed opening required '/usr/local/www/mediawiki/vendor/composer/../../extensions/Validator/Validator.php' (include_path='/usr/local/www/mediawiki/vendor/pear/console_getopt:/usr/local/www/mediawiki/vendor/pear/mail:/usr/local/www/mediawiki/vendor/pear/mail_mime:/usr/local/www/mediawiki/vendor/pear/net_smtp:/usr/local/www/mediawiki/vendor/pear/net_socket:/usr/local/www/mediawiki/vendor/pear/net_url2:/usr/local/www/mediawiki/vendor/pear/pear-core-minimal/src:/usr/local/www/mediawiki/vendor/pear/pear_exception:.:/usr/local/share/pear') in /usr/local/www/mediawiki/vendor/composer/autoload_real.php:45 Stack trace: #0 /usr/local/www/mediawiki/vendor/composer/autoload_real.php(49): {closure}('c3ae67574219cc5...', '/usr/local/www/...') #1 /usr/local/www/mediawiki/vendor/autoload.php(22): ComposerAutoloaderInit_mediawiki_vendor::getLoader() #2 /usr/local/www/mediawiki/includes/AutoLoader.php(301): require_once('/usr/local/www/...') #3 /usr/local/www/mediawiki/includes/Setup.php(126): require_once('/usr/local/www/...') #4 /usr/local/www/mediawiki/includes/WebStart.php(85): require_once('/usr/local/www/...') #5 /usr/local/www/mediawiki/index.php(50): require('/usr/local/www/...') #6 {main} thrown in /usr/local/www/mediawiki/vendor/composer/autoload_real.php on line 45