There is a warning about HTTPS

I just visited and I see a valid certificate from a legitimate authority - and not the one in your screenshot. I think you should take the possible attacker warning seriously.

The SSL certificate seems to be correct.
I just checked with this tool: SSL Checker
@Quan_Li : It seems that this is a DNS problem. In your case, is solving with the ip of the server instead of the correct ip.
To check this try with another DNS servers.