Warning: Unsupported declare 'strict_types' in D:\xampp\htdocs\prdk-wb-be\vendor\league\commonmark\src\Delimiter\DelimiterStack.php on line 3

Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in D:\xampp\htdocs\prdk-wb-be\vendor\league\commonmark\src\Delimiter\DelimiterStack.php on line 30