Kaltura_Client_Exception thrown

Invalid KS "ZjU4ZDFlZGQ4N2NkOTc4ZWRjY2Q5Zjc1MDg4MDI0NjA3OTQwOTU1ZXwxMDE7OzE0NzIzNjAyODQ7MjsxNDcyMjczODg0LjkxNjM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"