Warning: require_once(vendor/composer/vendor/autoload.php): Failed to open stream: No such file or directory in /var/www/html/ilias/components/ILIAS/Data/tests/DateFormatTest.php on line 20

Fatal error: Uncaught Error: Failed opening required 'vendor/composer/vendor/autoload.php' (include_path='.:/usr/share/php') in /var/www/html/ilias/components/ILIAS/Data/tests/DateFormatTest.php:20 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Data/tests/DateFormatTest.php on line 20