Warning: require_once(Doctrine/Common/ClassLoader.php) [function.require-once]: failed to open stream: No such file or directory in /home/users/00/3c/21/home/www/vendor/doctrine/orm/bin/doctrine-pear.php on line 20

Fatal error: require_once() [function.require]: Failed opening required 'Doctrine/Common/ClassLoader.php' (include_path='.:/usr/lib/php-7.4.27') in /home/users/00/3c/21/home/www/vendor/doctrine/orm/bin/doctrine-pear.php on line 20