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

Fatal error: Class 'ZipStream\Exception' not found in C:\AppServ\www\caiwu\vendor\maennchen\zipstream-php\src\Exception\OverflowException.php on line 12