If you're running the image posted in the other topic, there's no support here for it, as it's already mentioned in the topic starter. You already posted there for support, so I'll be locking this topic.
RetroPie doesn't use the desktop env (which I think you'd need for VNC) and it doesn't have it installed by default if you use the provided image. While some Pi4 users run EmulationStation from the desktop, it's not a supported or tested configuration and you may bump into problems at some point.
Occasionally, we may send emails to your registered email address in order to provide updates and/or to notify you of new activity that is pertinent to you. You can customise the frequency of the community digest (including disabling it outright), as well as select which types of notifications to receive via email, via your user settings page. Unless explicitly changed in your user settings.
If you mean this, it's referring to emails about the forum etc. And how you receive notifications. Nothing more
