Errors in laravel project

I created a laravel project using this command composer create command-project laravel / laravel --prefer-dist then i open the project in netbeans but the project contains errors.

One of the errors is in class_with_method_that_declares_anonymous_class

$o = new class { public function foo() {} };

Another mistake is in ReportSpecificationstarts, among others.

Does anyone know why this happens?