So, I couldn't leave things alone, I decided to upgrade the App Code and Driver code for both my hubs for HubConnect and now I'm no longer getting events being sent from the primary to the secondary hub.
Any tips on how to resolve?
Each time I go into the Secondary Hub App, I see this, and clicking Done doesn't stop it from showing the next time:
New Version Detected!
This HubConnect Remote Client has an upgrade that has been installed...
Please click [Done] to complete the installation.
app:452019-12-23 11:21:55.405 errorjava.lang.NullPointerException: Cannot invoke method setConnectionType() on null object on line 1085 (remoteUpdate)
app:452019-12-23 11:21:55.396 errorUnable to create the Server Hub monitoring device: com.hubitat.app.exception.UnknownDeviceTypeException: Device type 'HubConnect Remote Hub' in namespace 'shackrat' not found. Support Data: [id: "serverhub-192.168.1.107", name: "HubConnect Hub", label: "Server Hub"]
I would go back through the key exchange process. Set the communication type to http until you are certain that everything is working. Paste the key into the remote and keep an eye on the logs. That should get things going again.