Warning: require_once(ExtensionSettings.php): Failed to open stream: No such file or directory in /var/www/mediawiki-1.43.9/LocalSettings.php on line 266

Fatal error: Uncaught Error: Failed opening required 'ExtensionSettings.php' (include_path='/var/www/mediawiki-1.43.9/vendor/pear/console_getopt:/var/www/mediawiki-1.43.9/vendor/pear/mail:/var/www/mediawiki-1.43.9/vendor/pear/mail_mime:/var/www/mediawiki-1.43.9/vendor/pear/net_smtp:/var/www/mediawiki-1.43.9/vendor/pear/net_socket:/var/www/mediawiki-1.43.9/vendor/pear/net_url2:/var/www/mediawiki-1.43.9/vendor/pear/pear-core-minimal/src:/var/www/mediawiki-1.43.9/vendor/pear/pear_exception:.:/usr/share/php') in /var/www/mediawiki-1.43.9/LocalSettings.php:266 Stack trace: #0 /var/www/mediawiki-1.43.9/includes/Setup.php(216): require_once() #1 /var/www/mediawiki-1.43.9/includes/WebStart.php(85): require_once('...') #2 /var/www/mediawiki-1.43.9/index.php(50): require('...') #3 {main} thrown in /var/www/mediawiki-1.43.9/LocalSettings.php on line 266