Warning: Unsupported declare 'strict_types' in C:\AppServ\www\caiwu\vendor\maennchen\zipstream-php\src\Bigint.php on line 2

Fatal error: Default value for parameters with a class type hint can only be NULL in C:\AppServ\www\caiwu\vendor\maennchen\zipstream-php\src\Bigint.php on line 20