Kaltura_Client_Exception thrown

Invalid KS "M2Y1MTUyOGIzNjRmMjdiNjIzMGQwYTE1ZGNmMTM5ZGVjM2Y5OTY1NXwxMDE7OzE0OTMwNTA4MTA7MjsxNDkyOTY0NDEwLjM1NjU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"