Warning: require_once(/data/user/htdocs/vendor/autoload.php): Failed to open stream: No such file or directory in /data/user/htdocs/index.php on line 6

Fatal error: Uncaught Error: Failed opening required '/data/user/htdocs/vendor/autoload.php' (include_path='.:') in /data/user/htdocs/index.php:6 Stack trace: #0 {main} thrown in /data/user/htdocs/index.php on line 6