Skyconnect dongle installation failure with Silicon Labs Multiprotocol add-on

When adding the Silicon Labs Multiprotocol add-on it fails with the following log

Add-on: Silicon Labs Multiprotocol
Zigbee and OpenThread multiprotocol add-on

Add-on version: 2.3.1
You are running the latest version of this add-on.
System: Home Assistant OS 10.4 (aarch64 / raspberrypi4-64)
Home Assistant Core: 2023.8.1
Home Assistant Supervisor: 2023.08.1

Please, share the above information when looking for help
or support in, e.g., GitHub, forums or the Discord chat.

s6-rc: info: service banner successfully started
s6-rc: info: service universal-silabs-flasher: starting
[10:26:03] INFO: Checking /dev/ttyUSB0 identifying SkyConnect v1.0 from Nabu Casa.
[10:26:03] INFO: Starting universal-silabs-flasher with /dev/ttyUSB0
2023-08-10 10:26:04 homeassistant universal_silabs_flasher.flash[181] INFO Extracted GBL metadata: NabuCasaMetadata(metadata_version=1, sdk_version=‘4.3.1’, ezsp_version=None, ot_rcp_version=None, fw_type=<FirmwareImageType.RCP_UART_802154: ‘rcp-uart-802154’>, baudrate=460800)
2023-08-10 10:26:04 homeassistant universal_silabs_flasher.flasher[181] INFO Probing ApplicationType.GECKO_BOOTLOADER at 115200 baud
2023-08-10 10:26:06 homeassistant universal_silabs_flasher.flasher[181] INFO Probing ApplicationType.CPC at 460800 baud
2023-08-10 10:26:10 homeassistant universal_silabs_flasher.flasher[181] INFO Probing ApplicationType.CPC at 115200 baud
2023-08-10 10:26:14 homeassistant universal_silabs_flasher.flasher[181] INFO Probing ApplicationType.CPC at 230400 baud
2023-08-10 10:26:19 homeassistant universal_silabs_flasher.flasher[181] INFO Probing ApplicationType.EZSP at 115200 baud
2023-08-10 10:26:24 homeassistant universal_silabs_flasher.flasher[181] INFO Probing ApplicationType.SPINEL at 460800 baud
Error: Failed to probe running application type
s6-rc: warning: unable to start service universal-silabs-flasher: command exited 1
/run/s6/basedir/scripts/rc.init: warning: s6-rc failed to properly bring all the services up! Check your logs (in /run/uncaught-logs/current if you have in-container logging) for more information.
/run/s6/basedir/scripts/rc.init: fatal: stopping the container.
s6-rc: info: service mdns: stopping
s6-rc: info: service banner: stopping
Default: mDNSResponder (Engineering Build) (Aug 4 2023 21:48:56) stopping
s6-rc: info: service banner successfully stopped
s6-rc: info: service legacy-cont-init: stopping
s6-rc: info: service legacy-cont-init successfully stopped
s6-rc: info: service fix-attrs: stopping
s6-rc: info: service fix-attrs successfully stopped
s6-rc: info: service s6rc-oneshot-runner: stopping
s6-rc: info: service s6rc-oneshot-runner successfully stopped
[10:26:28] INFO: mDNS ended with exit code 4 (signal 0)…
s6-rc: info: service mdns successfully stopped’

The SiLab Multiprotocol Add-On is not able to talk to the SkyConnect.

In the Add-On, check the “Configuration” tab and see what device is configured.
You should have an option like “/dev/serial/by-id/usb-Nabu_Casa_SkyConnect_v1.0_blah-blabh-if00-port0”.

Make sure nothing is using the port (disable ZHA or Zigbee2MQTT)