@DrDoom9 the site you Linked to,
explains in the Top Section, how to access a site with a certificate Expiration Error.
"In most cases, the error won’t actually prevent you from accessing the site. You can ignore it and click through to the page you’re trying to visit, but we don’t recommend it."
I think in this Case, it's a website you have used 100's of times and know it is safe.Now, if this was the very 1st time visiting a web site, and you see this error, Sure you might not want to
ignore the error and continue to the site.
But we know this is a legitimate and safe site.
NET::ERR_CERT_DATE_INVALID
In the case of this particular error, the certificate has expired.
It goes through it step by step for the most popular Browsers.
Google Chrome
The error text in Chrome explicitly states that your connection is not private. You can usually proceed to the site anyway by clicking on the Advanced button, but there is some risk involved:
Firefox
Firefox gets your attention by displaying a bright yellow outline around its security warning. As with Chrome, you can usually ignore the notice and proceed to the website by clicking on the Advanced button:
Microsoft Edge see Google Chrome above
Microsoft Edge’s error screen is nearly identical to the one Chrome displays. However, the Edge error may include how many days ago the site’s SSL certificate expired:
use the Advance Button...
Safari
If you’re using Safari, your warning may come in the form of a pop-up rather than a full screen. Again, it’s a straightforward process to continue to the potentially unsafe website by clicking on the Continue button:
At the Bottom, the 10 steps...
for this Error
NET::ERR_CERT_DATE_INVALIDthey will NOT help in any way what so ever...
It's not a mistake of not being able to read the Certificate, it's an Expired Certificate.