Kaltura_Client_Exception thrown

Invalid KS "ZTc0ZDBjYzI4Y2NmNGYyZGI3N2Y3M2Q5MGUyYmEyZjA5NjU3N2Q3N3wxMDE7OzE0ODgzNDg0MDg7MjsxNDg4MjYyMDA4LjQ3ODg7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"