A warm welcome and thanks for posting on our community forums.
We're sorry to hear you're having an issue with the Connect App recognising your hub.
The first thing to be aware of is you need to be connected to your Home WiFi in order for the app to connect to the Hub. It won't allow the connection if you're on a Guest network, VPN or Mobile data. If this still doesn't help, try clearing the data within the Connect App. These steps will help you do that:
For your Apple device, you can try this: Open Settings > Tap your name > Tap iCloud > Tap Manage Settings > Tap the Connect App > Tap Delete Data.
For your Android device, you can try this: Open settings > Apps > Connect App > Storage > Clear data / Clear cache.
If this also fails then we currently have a known error with some of the data in our systems, that is causing the app to not recognise the Hub in a minority of instances. We are already investigating this as a high priority.
Pop back and keep us posted.
Kind regards Jodi,