Your website appears to be on the IP address 185.27.134.223, which is currently down. This is likely the result of a DDoS attack, but we don’t know exactly.
Of course, if the entire IP address is down, then our check to look up the certificate being used doesn’t work. You can’t see which SSL certificate is being used for the HTTPS connection if you can’t connect.
If it’s a DDoS attack, it will be resolved when the attack stops. If you want to know when that is, you’d have to ask the attacker. With a DDoS attack, all we can do is to monitor the situation and contain the impact.