Kaltura_Client_Exception thrown

Invalid KS "NzJkOWU2MWZjMzNlODIwMDc0NzFmNmI2NjBmNjdhZTM2OTM4YzRjZXwxMDE7OzE0OTg3ODkwNTI7MjsxNDk4NzAyNjUyLjIzMTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"