"Cannot Connect to App Store" when can we expect a fix?

Since Mojave, the App Store on my MacbookPro is broken. First I thought it was because of the upgrade process, so I did a fresh install of Mojave, wiping my storage. But this didn't fix anything.

I also did a second fresh install, no effect.

I read on some threads that the AppStore and broken and will need a fix, here for example, but there are other threads like this.

Problem is those messages date from the last october for the most recent ones. So when can we expect to get a proper fix for this issue? And if we can't use the App Store, how would the fix be installed on the impacted computers?

Thanks.