Warning: Unsupported declare 'strict_types' in C:\xampp\htdocs\monitor\vendor\nikic\php-parser\lib\PhpParser\Node\Scalar.php on line 1

Fatal error: Class 'PhpParser\Node\Expr' not found in C:\xampp\htdocs\monitor\vendor\nikic\php-parser\lib\PhpParser\Node\Scalar.php on line 6