In iOS 14, Apple added a privacy setting called Local Network for Apps that access the local network. When this setting is on apps can discover devices on your local network. Cortex Onboard requires this privacy setting to be enabled, so that it can discover and connect to the Hub’s network service.
It seems on updating Cortex Onboard in iOS 14, sometimes the Local Network setting defaults to off, and the user is not prompted to confirm whether this is correct.
The impact of this is that Cortex Onboard cannot fully connect to the Hub, and displays the Trying To Connect overlay.
To check (and alter if necessary) that Local Network access is granted to Cortex Onboard.
Scroll down until you see Cortex Onboard
Select Cortex Onboard & toggle Local Network if necessary