SUMMARY When setting up a new system, kdeconnect won't get automatically allowed on the firewall. This causes the application to not be able to see other devices on the same network. When the user clicks refresh and there's no devices found and no devices connected, offer some troubleshooting options, including a reminder to check the firewall with a link to https://userbase.kde.org/KDEConnect#I_have_two_devices_running_KDE_Connect_on_the_same_network,_but_they_can't_see_each_other or other relevant spot in that wiki page.
*** This bug has been marked as a duplicate of bug 358440 ***