Why won't my Mac show my location? Location Services is on, Maps is enabled, internet is connected?

If I open Maps and click on Home or my location, or I look at a different location then click on home or my location, Maps gives the message: "Cannot Show Your Location".

Apple Support/help just tells me to go to: Systems Preferences/Security & Privacy/Privacy/Enable Location Services [checked]/Maps [checked], but it still doesn't work.

What do I do?

I am having a similar issue with my Weather app on my iPhone 12; I still have not received a resolution to that issue from the Apple Support forums, please, can somebody help?