Warning: Unsupported declare 'strict_types' in D:\xampp\htdocs\wsdemo\vendor\nikic\php-parser\lib\PhpParser\PrettyPrinter\Standard.php on line 1

Fatal error: Class 'PhpParser\PrettyPrinterAbstract' not found in D:\xampp\htdocs\wsdemo\vendor\nikic\php-parser\lib\PhpParser\PrettyPrinter\Standard.php on line 17