Corrupted Content Error on web site

When I try to go to, my Firefox browser puts up a screen that says:

Corrupted Content Error

The site at has experienced a network protocol violation that cannot be repaired.

The page you are trying to view cannot be shown because an error in the data transmission was detected.

** Please contact the website owners to inform them of this problem.**

This just started today. I haven’t had problems previously. ( I had to install Chromium to post this).

[edit: Firefox version 60.0.1]

I don’t see this problem in Firefox 60 on Linux nor on mobile.

Could something be wrong with your connection?

Yeah, I cleared browser data and got it fixed up. Thanks!