Kaltura_Client_Exception thrown

Invalid KS "NGFmYzBhMDkyYjg5MDkwMzZjNThiMDQ3Yjg4Yzc0MDkyNmEwMmViOHwxMDE7OzE0OTMzMTUwMDI7MjsxNDkzMjI4NjAyLjQ4OTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"