When I click pauls link I see his site. However that does not mean that the problem is local to individual users.
There seems to be a weird DNS propigation error
Check this link
https://www.whatsmydns.net/#A/pmulcahy.com
When I ran this a minute ago I got 2 different IP addresses
New York NY, United States Speakeasy
199.204.248.103
Mountain View CA, United States Google
199.204.251.141
I have only seen something like this happen when one moved dns records to another host and then changed ip addresses almost immediately (before the host change propagated). It took over a week for that to settle and about 50% of users saw some sort of problems during that time. (Of course none of the devs did so we had trouble diagnosing it)
The 103 address is the correct one I believe so google having the wrong address is troublesome but it may resolve itself.
Here is another link which shows 103 being more popular.
https://dnschecker.org/#A/pmulcahy.com so that give me hope.
Edit;
Unfortunately as Pauls site is hosted on a multi site server you cant simply go to the IP address. There are tricks to get there, but before I go into instructions on changing your DNS provider or editing you local host files lets hope it resolves itself.