Warning: require_once(C:/www/vendor/autoload.php): Failed to open stream: No such file or directory in /farah/index.php on line 9

Fatal error: Uncaught Error: Failed opening required 'C:/www/vendor/autoload.php' (include_path='.:/usr/local/lib/php') in /farah/index.php:9
Stack trace:
#0 {main}
  thrown in /farah/index.php on line 9