404. That’s an error.
The requested URL /_/+1/confirm?hl=ja&url=https://mag02.net/2017/08/21/%E3%83%80%E3%83%8B%E3%81%AB%E5%88%BA%E3%81%95%E3%82%8C%E3%81%9F%E8%B7%A1%E3%81%AE%E7%89%B9%E5%BE%B4%E7%97%87%E7%8A%B6%E3%81%AF%E4%BA%8C%E3%83%B6%E6%89%80%E8%B5%A4%E3%81%84%E8%85%AB%E3%82%8C%EF%BC%9F/
was not found on this server. That’s all we know.