Kaltura_Client_Exception thrown

Invalid KS "ZTYxMDY3MjM1Nzc0NGJmZTQ0ZWUxYmIzMGFhMDMyZjgxNGJhMDBiYnwxMDE7OzE0NzQ5NjIxMjQ7MjsxNDc0ODc1NzI0LjIyNTE7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"