Kaltura_Client_Exception thrown

Invalid KS "Y2Y3Y2YxYTdjZWYwODUzYWNkZmYwMDZiOGUzOTA0Njc2YjQ1MTMwN3wxMDE7OzE0ODUwMjIxMjM7MjsxNDg0OTM1NzIzLjAyMjk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"