Error: Unable to check for updates (when launching ZOOM app on new MacBook Air)

Hi,

I recently purchased a new MacBook Air and have been having problems with launching ZOOM since.  I have no problem access meetings via my browser (although weirdly anytime I share my screen I get muted and can't unmute myself) but my main issue is when I try to launch the ZOOM app (which I have had no issues with before) I get a pop up box that says "Unable to check for updates.  Please check your internet connection and try again. (Install)).

My internet connection is fine.  When I click install nothing happens.

I have uninstalled and reinstalled the ZOOM app but the same thing happens.  I am not having issues with any of my other apps.  

Can anybody help please?