Warning: Unsupported declare 'strict_types' in D:\xampp\htdocs\jukester_release4\vendor\sebastian\diff\src\Exception\InvalidArgumentException.php on line 1

Fatal error: Interface 'SebastianBergmann\Diff\Exception' not found in D:\xampp\htdocs\jukester_release4\vendor\sebastian\diff\src\Exception\InvalidArgumentException.php on line 14