Look at your screenshot. The site you tried to access was www.legacykline.com. You did not try
which worked for me on a Chrome derivative browser called Vivaldi. In fact, when I clicked on the link you tried to use, my browser automatically took me to the new address. Your issue is probably a browser security issue involving the DNS server utilized.
Chuck, I tried both addresses as noted in the browser line in both screen shots above. Strange that today I'm now able to access the K-Line Legacy sites from both addresses above without any changes to my browser/cache etc. I sometimes receive those pesky DNS error messages which I'm trying to determine if it's due to browser settings OR my local Comcrook (oops I mean Noncast, oops... Comcast) connection.