404. That’s an error.

The requested URL /_/+1/confirm?hl=ja&url=https://yaruki.net/article/literacy.html/%E3%83%AA%E3%83%86%E3%83%A9%E3%82%B7%E3%83%BC%E8%83%BD%E5%8A%9B%E5%90%91%E4%B8%8A was not found on this server. That’s all we know.