Kaltura_Client_Exception thrown

Invalid KS "NjA4MDk1OGRjNTY1ZDljZGUxZTBlMTBhZDA0ZWNmZTNiNGVkNTYxNnwxMDE7OzE0NzUzNDI4Njk7MjsxNDc1MjU2NDY5LjA2NDM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"