Hi Zarthan. Thanks for your lightning fast response.
I have found the error(s)...
Useful for other noobs for future reference. My device came with Zigbee and Z-Wave radios, but the device isn't big enough to fit both. So the error above is because I didn't have the radio connected.
The workaround is to force them both in at the same time and it now works. It's not mentioned in the docs that they don't fit the design. Worth mentioning here.
I guess if your problem is fixed, it's fixed, but...having the USB radios inserted should not solve this problem. The Hue Bridge integration works over the LAN (Hue uses Zigbee, but that communication is done separately on the Hue network; Hubitat only speaks to Hue over TCP/IP via the Hue Bridge). Hubitat uses the Ethernet connection for this.
Not sure what would have been going on, but I'm guessing maybe it never found your bridge the first time? In any case, glad it's working!
Thanks Bert - it found my bridge several times, but couldn't continue after pressing next. If you wanted to make this easier for noobs you might introduce an interstitial after the Bridge is connected to say "Hey, we got your bridge but we cant continue until you plug in the radio".