In this situation, JuiceBox or JuiceBox Pro using Wi-Fi, the unit may have lost connectivity with the Wi-Fi router.
If you receive a notification stating the unit is ‘offline’ and then another to say its ‘back online’, you may have experienced temporary outage. However, if this situation persists, then the source of the Wi-fi signal needs to be evaluated, we recommend at least a signal strength of -70 dbm.
In the case of the JuiceBox Pro Cellular, the unit may be struggling to achieve a cellular signal. If the unit has lost signal more than once, this may be caused be an outage form the SIM provider. If the situation persists with regular notifications of this nature, then the signal strength from the mobile provider may need evaluated.