Kaltura_Client_Exception thrown

Invalid KS "NWVjMjkwNjEzN2RiMWExYjg1OGIzNDU2ZjFkNGE1NGVjZDVmN2VkYXwxMDE7OzE0OTU2NDUyMDQ7MjsxNDk1NTU4ODA0LjA3OTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"