The main reason for accessing the WiFi Settings tab is to change WiFi network and/or password. If WiFi details have changed, the EC device will not be able to access the network.
Occasionally you may also want to change WiFi networks. Make sure any new network is correctly configured and the computer running EmbroideryHub is connected.
Tip: The list of available WiFi networks may not refresh immediately. Try closing and re-opening the dialog for the selected EC device as necessary.