(System Idle) is a normal message displayed when the controller is not running any zones or programs.
If you updated from firmware 2.2.0 or earlier to 2.2.1, the WiFi setting will be erased, you need to follow the WiFi configuration step to have the controller log onto your WiFi router again. Factory reset, WiFi reset will also erase WiFi settings. Did you follow the WiFi configuration step in the user manual?