Unable to pair a new device, not sure how to debug

[Patabugen]

I have a fairly new HA setup, and I'm trying to setup the Flic integration so my buttons can talk directly to the HA.

I'm running on a Raspberry Pi 3 Model B.

I've setup the Addon, and it's happily running in the background, and the Integration isn't reporting any issues - but holding down a button for more than 7 seconds doesn't make anything appear in the "Integration Entries".

I've tried a brand new button, and one which I used to use with my Flic Hub, and also tried turning off the Flic Hub in case that helps.

The brand new button pulses the LED red a couple of times, the previously-used one pulses orange.

My main question is: How do I debug?

The addon logs show me this:

I've tried clicking the "Enable debug logging" on the Flic integration - but I don't know how to view that log.

How can I see whether the Flicd Addon is recieving anything from the button?