Setting up MQTT on Ubuntu to run Frigate

I'm trying to setup Frigate in a Docker container running on Ubuntu 22.04 on my Beelink. To do so you need have some prerequisites.

1. Docker
2. MQTT
3. And more

I've installed Mosquitto MQTT before on a Raspberry Pi running Ubuntu 22.04 and it worked. After trying to install it again on my Beelink running Ubuntu, it gave the error seen in the screenshot.

Any advice?

I've uninstalled it and reinstalled it. This is all new to me. Just started using Linux and the terminal.

Apologies for not attaching the screenshots earlier. I don't have access to the actual text right now. I'll be sure to add text next time instead of a screenshot.

enter image description here