Kaltura_Client_Exception thrown

Invalid KS "ZmUxMzIyNmMwNjIwY2ExYjcyNWE2NzRhZjRjNDhiM2E0NjVkNWVhNXwxMDE7OzE0NzQ5MTkwNjE7MjsxNDc0ODMyNjYxLjI3OTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"