Warning: require_once(vendor/autoload.php): failed to open stream: No such file or directory in /srv/users/serverpilot/apps/app/public/pdf.php on line 3

Fatal error: require_once(): Failed opening required 'vendor/autoload.php' (include_path='.:/opt/sp/php7.4/lib/php') in /srv/users/serverpilot/apps/app/public/pdf.php on line 3