Nest Thermostat can't conect to WiFi

We installed a Nest Learning thermostat about a year ago in our 2nd home where we have Hughesnet internet.  We were able to access the thermostat using the remote app until a few months ago.  The battery in the thermostat was not charging and at some point the thermostat shut down.  We have manually charged the thermostat, replaced the internal battery and rewired the thermostat, but it still can't access the WiFi network.

Any suggestions for getting the thermostat back online?