"Press and hold the power button for 5-7 seconds first! (Light will begin flashing)"
I did and it does. I even moved the Canvas in to the room where my desktop is so I could have only a second or so delay between the lights flashing and clicking Authorize. Still "access forbidden."
Any fix for this besides resetting the Canvas totally and re-adding it to my HomeKit? For perhaps the first time, the HomeKit side is working fine, but Indigo has lost communication with this one panel set. Two other panel sets are working fine.