Warning: require_once(vendor/autoload.php): Failed to open stream: No such file or directory in /www/wwwroot/nofeature.com/s3client.php on line 4

Fatal error: Uncaught Error: Failed opening required 'vendor/autoload.php' (include_path='.:') in /www/wwwroot/nofeature.com/s3client.php:4 Stack trace: #0 /www/wwwroot/nofeature.com/filemanager.php(4): require_once() #1 /www/wwwroot/nofeature.com/index.php(5): require_once('...') #2 {main} thrown in /www/wwwroot/nofeature.com/s3client.php on line 4