Warning: require_once(vendor/autoload.php): failed to open stream: No such file or directory in /home/dewart/public_html/phpmailer/test/bootstrap.php on line 2

Fatal error: require_once(): Failed opening required 'vendor/autoload.php' (include_path='.:/opt/cpanel/ea-php74/root/usr/share/pear') in /home/dewart/public_html/phpmailer/test/bootstrap.php on line 2