HA throwing invalid serial port message on new HA install

[Dbagioni]

All
Im new to HA. Ive just transitioned from another platform to HA. Im running my HA on a Ubuntu 20.04 server, and installled the HA via Docker.
When I search I can find me serial gateway on /dev/ttyUSB0, but when I enter the info into the HA integration I get "invalid serial port". Can anyone give me a clue as to how to get this running?

[ferro]

@Dbagioni Maybe you did not map the device file (/dev/ttyUSB0) to the container, check this:
https://www.home-assistant.io/installation/raspberrypi#exposing-devices