404. That’s an error.

The requested URL /_/+1/confirm?hl=ja&url=https://poteto.media/s-size/%E6%97%A5%E6%9C%AC%E3%81%AE%E6%B5%B7%E3%81%AF%E5%A4%A7%E4%B8%88%E5%A4%AB%EF%BC%9F/ was not found on this server. That’s all we know.