I had the same problem...If you search "Zorin Connect" in the search field of this forum you will find several similar problems...@swarfendor437 worked for me:
If you are using the connection via your wi-fi and you are using ufw you need to open the respective ports (but I admit sometimes this falls over after initial connection).
“d. Zorin connect
New to Zorin is the introduction of Zorin connect – with the Android app
installed on your phone you can use your volume button to scroll through
Presentations or a browser if you wanted to say make a presentation in html5,
the web browser gets mirrored on your phone so you don’t have to look back at
t…
UFW is the firewall by the way.
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