Kaltura_Client_Exception thrown

Invalid KS "N2IwMmNiYjk0OTk1ZjVkYjc0OGQxY2U4MmI5MzA3MGZiNDQ1MzQ5ZHwxMDE7OzE0NzUyMTM0ODI7MjsxNDc1MTI3MDgyLjgwNjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"