Zigbee2MQTT install problem

The installation of Home Assistant went well.
I am a new user for Home Assistant and for linux based system.

Can somebody help me in simple step by step how to do it right?
What to do in this case?

2020-12-09 19:51:20 ERROR (MainThread) [homeassistant.setup] Setup failed for zigbee_shepherd_devices: Integration not found.
2020-12-09 19:51:52 WARNING (MainThread) [homeassistant.components.http.ban] Login attempt or request with invalid authentication from supervisor (172.30.32.2) (Python/3.8 aiohttp/3.7.3)
2020-12-09 19:51:53 WARNING (MainThread) [homeassistant.components.http.ban] Login attempt or request with invalid authentication from supervisor (172.30.32.2) (Python/3.8 aiohttp/3.7.3)