I recently replaced a C8 unit with a C8 Pro. That went fine.
I intended to re-purpose the C8 for testing things without having to worry about messing up the C8 Pro in it's day-to-day activities.
I did a Full Reset of the old C8 and that seemed to go fine. I was able to connect, add apps, add devices, etc.
I wanted to test HUE integration and read the docs and installed the app. It found all of my devices and groups from which I selected the ones I wanted to work with.
The docs said the devices would appear for selection in things like the Basic Rule app.
So far I see no HUE devices in anything other than the HUE Integration app.
I assume you selected the devices to add and hit Done in the Hue Bridge Integration app? This should put them in your Devices list (accessible from the menu on the left side of the hub UI), and, if they are there. they should be selectable in any app that looks for lights.
In any case, Devices is the first place to look. Thinking of it another way, you can't select something if it doesn't exist.
I'm guessing the app was waiting on a condition to be met that allowed it to continue and collect the HUE lights and groups. Shortly after this series of errors the "initializing" line was followed by lines mentioning the HUE lights and groups and what was being done with each.
