I have tried through the app page. I checked the Docker Hub URL and it gets a 404 error.
https://hub.docker.com/r/siwatinc/homebridge_gui_x_unraid/
I then went to https://hub.docker.com/r/siwatinc then clicked to homebridge_gui link and tried again and get the following error.
root@localhost:# /usr/local/emhttp/plugins/dynamix.docker.manager/scripts/docker run -d --name='HomeBridgewithwebGUI' --net='host' -e TZ="America/Chicago" -e HOST_OS="Unraid" -e 'aptpackages'='ffmpeg' -e 'packages'='homebridge-pilight homebridge-info homebridge-wemo' -v '/mnt/user/appdata/homebridge':'/root/.homebridge':'rw' 'siwatinc/homebridge_gui_x_unraid'
Unable to find image 'siwatinc/homebridge_gui_x_unraid:latest' locally
/usr/bin/docker: Error response from daemon: pull access denied for siwatinc/homebridge_gui_x_unraid, repository does not exist or may require 'docker login'.
See '/usr/bin/docker run --help'.
The command failed.