Kaltura_Client_Exception thrown

Invalid KS "ZTY2MDEzMTYxODlhNjYwZTI3MjE5NWU4N2IxYjZiNjdhZTJmMmUxNHwxMDE7OzE0OTA5OTQyNjg7MjsxNDkwOTA3ODY4LjQ4NTI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"