Warning: require_once(vendor/autoload.php): Failed to open stream: No such file or directory in I:\www\pvcHtml\vendor\league\container\examples\event-system.php on line 11

Fatal error: Uncaught Error: Failed opening required 'vendor/autoload.php' (include_path='.;C:\php\pear') in I:\www\pvcHtml\vendor\league\container\examples\event-system.php:11 Stack trace: #0 {main} thrown in I:\www\pvcHtml\vendor\league\container\examples\event-system.php on line 11