Safari Can't Open Page

I have used the site gifbin.com for years without any issue, but when I went to access it a couple of days back, I got the error shown below in the screen shot.

I am using a MBP and have searched the web looking for a solution. To date I have:

Cleared all caches
Cleared all cookies
Reinstalled Mohave
Run OnyX

All to no avail.

Does anyone have any idea as to how I can regain access to gifbin.com?

Attached Images

Screen Shot 2019-02-01 at 5.15.35 PM.jpg (63.5 KB)

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