Cannot connect to App Store

So, out of nowhere, my App Store does not connect to the servers anymore.

I cannot sign in, neither can I see any of the apps (on "Discover" for example)

It was working fine before I updated Mojave < 10.14.6. I have an AMD hack. I don't think this is a hardware issue since it was working perfectly fine before.

Does anyone have any ideas? I would really appreciate it!