hi
when i am trying to tun bagiston in git bash it is showing me error like

Warning: Class 'Nette\DI\Definitions\ServiceDefinition' not found in C:\wamp64\www\bagisto\vendor\nette\di\src\compatibility.php on line 12

Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in C:\wamp64\www\bagisto\vendor\nette\di\src\DI\Definitions\ServiceDefinition.php on line 43
can this be package version error?