Still driving me nuts. I cannot get any Matter device connected to Homey. It always ends in 0x00ac. unable to connect internal (0x00ac).
I’ve bought different devices, the most recent is the shelly 1 gen 4. The idea was that it does not required a hub to update the firmware. I started with the matter devices from Ikea, but I do not have an ikea hub, so maybe these ikea devices miss a required firmware update or something 
. Then I tried Switchbot smartplugs. I was able to connect the Switchbot devices to Homey, but I wasn’t really certain it was via Matter… Adding them was a weird process and it took a zillion years for them to get detected.
The Shelly wanted to update the firmware on its own, since I connect it via Wifi to the internet. That worked. The Gen4 versions can connected via Wifi , Zigbee and Matter. I tried Matter, and the first time I tried, all worked like I would have expected. Fast responsive “next-next-next”… great, until the final step. After it says, devices added to Homey 
I get the next screent that says: unable to connect internal (0x00ac)
(sad trombone) 
I tried to add it to Homekit (AppleTV or Homepod)… works as expected.
Enabled “Paring Mode” in Homekit and tried to add it to homey.
Same result… unable to connect internal (0x00ac). 
Where should investigate?
