Warning: include(/var/www/html/vendor/composer/../../extensions/SemanticMediaWiki/includes/Setup.php): failed to open stream: No such file or directory in /var/www/html/vendor/composer/ClassLoader.php on line 444

Warning: include(): Failed opening '/var/www/html/vendor/composer/../../extensions/SemanticMediaWiki/includes/Setup.php' for inclusion (include_path='/var/www/html/vendor/pear/console_getopt:/var/www/html/vendor/pear/mail:/var/www/html/vendor/pear/mail_mime:/var/www/html/vendor/pear/net_smtp:/var/www/html/vendor/pear/net_socket:/var/www/html/vendor/pear/pear-core-minimal/src:/var/www/html/vendor/pear/pear_exception:.:/usr/local/lib/php') in /var/www/html/vendor/composer/ClassLoader.php on line 444

Fatal error: Uncaught Error: Class 'SMW\Setup' not found in /var/www/html/extensions/SemanticMediaWiki/SemanticMediaWiki.php:59 Stack trace: #0 /var/www/html/extensions/SemanticMediaWiki/SemanticMediaWiki.php(16): SemanticMediaWiki::load() #1 /var/www/html/vendor/composer/autoload_real.php(70): require('/var/www/html/e...') #2 /var/www/html/vendor/composer/autoload_real.php(60): composerRequire05db3b27d1f8c4b71ce47dbe4299bb07('cd9b6b6b76aed13...', '/var/www/html/v...') #3 /var/www/html/vendor/autoload.php(7): ComposerAutoloaderInit05db3b27d1f8c4b71ce47dbe4299bb07::getLoader() #4 /var/www/html/includes/Setup.php(60): require_once('/var/www/html/v...') #5 /var/www/html/includes/WebStart.php(88): require_once('/var/www/html/i...') #6 /var/www/html/index.php(39): require('/var/www/html/i...') #7 {main} thrown in /var/www/html/extensions/SemanticMediaWiki/SemanticMediaWiki.php on line 59