SSL certificates working for every browser/incognito combination except for Chrome (non-incognito)

For some reason, when I try and access by github page through either the custom domain (jameswright.xyz) or the github.io domain on my main chrome account, I get a security warning.  image.png

However, if I go into incognito mode it works fine.

image.png

In FireFox, it works fine. In Opera, it works fine. 

Checking every single SSL certificate checker I can find says it works fine.

I’m guessing the issue has to do something with needing to get a new SSL certificate or something like that, I just want to be sure of that before I randomly hacking into security stuff.

Which version of Chrome and on what operating system? If you’re not using the latest version of Chrome, can you try updating to the latest first?