404. That’s an error.
The requested URL /_/+1/confirm?hl=ja&url=https://yryr.me/programming/update/dbserializer-update-1-1.html was not found on this server. That’s all we know.
/_/+1/confirm?hl=ja&url=https://yryr.me/programming/update/dbserializer-update-1-1.html