Did you place the plugin in the correct folder? If you did it should appear under hardware in Domoticz.
The folder should be; /home/pi/domoticz/plugins/.

https://www.domoticz.com/wiki/Using_Python_plugins

Hi all, I've installed the plugin for the Xiaomi vacuum with all the prerequisites (Python 3 etc) on my RaspberryPi (Domoticz V3.8153). After adding the Xiaomi Mi Vacuum hardware I get the following error: “'exception': 'python-miio: [Errno 1] Operation not permitted'}”. What I've tried so far? - ...