Sometimes it helps to forcefully close and re-open the app to reset things. This is called "killing the app" - but it's pretty easy (and not at all dangerous).
- Go to settings on your Android phone
- Navigate to Apps
- Navigate to the GOFAR app
- Tap GOFAR and you will see some options
- Tap on the option labelled as [Force Stop] to close the GOFAR app
After doing this you will typically want to reopen GOFAR.