I've been having this same issue for the last few days in Chrome as well. Turning off AdBlock for the site did not fix it, nor did trying incognito mode. Also tried clearing all cookies for the site, no go. Works fine in Firefox, but fails in Chrome across all my PCs, regardless of whether I was logged in or not.

The article will briefly flash on screen before the error pops up about the certificate.

Currently running Chrome Version 78.0.3904.108 (Official Build) (64-bit) on Win 7