Did you recently switch ISPs? Changed your router/modem? Or maybe reset your wifi password?
The above changes will result in your Kangaroo security devices losing connection. To reconnect, please reset your Kangaroo security device then go to the Kangaroo mobile app for re-pairing. The pairing sequence includes a step that will allow you to select your preferred network or the same one using your new password.
Below is a video to better explain if you did some changes on your Wi-Fi or switched ISPs: