Privacy error on one computer for one specific website

Hello,

I hope someone here can help, because I feel like I have exhausted all of my other options. So I have a website, Josh and Jamie Photography | Hampton Roads and Virginia Beach Wedding Photography, that is built on the Wordpress platform. If I access my site or WP backend from any other computer (including my laptop on the same network or my iPhone), everything works as expected with no problems. However, on my main desktop PC, I get different errors, depending on the browser I am using.

Please note that all software and OS are updated and current, and I am using Avast Antivirus and MalwareBytes.

These are the errors I get:

Chrome: Privacy Error - NET::ERR_CERT_COMMON_NAME_INVALID
Firefox: No error, just goes directly to the default page of the host server that my site resides on
Edge: This Site Is Not Secure - Error Code: DLG_FLAGS_SEC_CERT_CN_INVALID

I have tried various troubleshooting methods that I have found for those specific errors, and none have worked. I have also tried disabling Avast and MalwareBytes as well, but to no avail. My webhost confirmed that SSL certificate is installed correctly, so it's not their problem.

Any help that someone could provide would be greatly appreciated!

Are using http or https?

Https

I had zero issues going to it and clicking on some links.

Is date and time correct on the PC?

Hi Ken

I tried all of your suggestions, but to no avail.

To answer the other questions, date & time are correct, synced automatically.

As I noted before, the problems that I am having accessing my site are only occurring on my main desktop PC. If I go from any other computer, it works fine. This is not convenient, though, as my main PC is where I do all of my graphics and design.

Yes, I do use Lastpass. Could that be the problem?