Error in App.php

I downloaded CI 4 for test development and i am accessing index.php page in public folder.
I got this error.
Parse error: syntax error, unexpected '.', expecting ',' or ';' in C:\wamp\www\CodeIgniter4-develop\application\Config\App.php on line 293
When i opened App.php line 293 the code was

public     $errorViewPath = APPPATH.'Views/errors';

I want to know why this error showing to me?

thanks