W3C validator: “handshake alert: unrecognized_name”

问题

I am trying to validate my website on W3C Nu Html Checker but I am getting below error, don't know why?

IO Error: handshake alert: unrecognized_name

While my website is working fine on SSL.

I tried Handshake alert: unrecognized_name error , but no help.

any guidance how to fix this much helpful. I didn't have that much knowledge of server.

来源：https://stackoverflow.com/questions/33580702/w3c-validator-handshake-alert-unrecognized-name