New integration attempts result in error: "Argh, your certificate is not valid!"

Hey team,

This is a *super* aggravating error because it worked yesterday in one of our organizations (and when I tested, I made another just fine) but isn't working in the other today:

Copied and pasted verbatim from your site. 

Attempt to upload, and get this error:

Argh, your certificate is not valid!

Check this url for a tutorial on how to generate a valid certificate.

( request debug id: 1994c223-1d01-4c78-87d8-64fb8e980803 )

ryanskihead​ I'm tagging you directly as i saw you replied to a similar thread.

I've tried three browsers, two operating systems, etc.