I’m having the same issue with installing crowdsec on a Unifi Network Application Server (Ubuntu 20.04).
It appears that crowdsec uses port 8080, which is already being used by the Unifi App.
I changed the ports in the yaml files and can get it installed, along with the firewall (also change ports), but the bouncer does not show in the Beta Dashboard.
It also shows that “unknown v1.2.1 available!” in the Dashboard for the agent even though it is version 1.2.1 already installed.