Kaltura_Client_Exception thrown

Invalid KS "YTI0ODI2ZjNmOWEwYzQ3NjdlMjNmNjI1YzFhMjEzMmU1Y2ZmYWIzN3wxMDE7OzE0NzQ4ODEwMTE7MjsxNDc0Nzk0NjExLjM2NzI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"