It happens to the best of us!
I took to visiting the site of Future2Tech which is organizing an event in Tirana this October, but as I added the url in the browser I was faced with a sad notice where my antivirus/firewall app had completely blocked the site, moreover the site was unsecure due to lacking a SSL certificate!
We've had this happen to some of our sites as well, which is why we maintain external monitoring services from most of our critical sites. Let's hope they will be able to get it fixed soon.