Warning: Unsupported declare 'strict_types' in C:\xampp\htdocs\ultra\sdk\php\src\Exceptions\OpenWAServiceUnavailableException.php on line 3

Fatal error: Class 'OpenWA\Exceptions\OpenWAApiException' not found in C:\xampp\htdocs\ultra\sdk\php\src\Exceptions\OpenWAServiceUnavailableException.php on line 16