Kaltura_Client_Exception thrown

Invalid KS "MGI1ZDU2Y2IwZjEwZTlhMjVjZDYwNzcwNTNiNmVlOGVlMzMzOGNhZXwxMDE7OzE0NzU0MzY0OTI7MjsxNDc1MzUwMDkyLjI5MztBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"