Sorry to ask in your post but it seemed to me that I was asking something similar.
My home assistant is this:
I am trying to correct everything she did and adapt it to my needs.
When I get home from work I try what they told me. The documentation I already read it. I don’t know English and the translation is sometimes not good. One of my problems was the permissions I had on the www folder. The last thing I did is correct that and plex created a folder under www. On that side I think he’s doing something.
The port opened it following the documentation. If I look at the open ports they are not visible. I don’t know if they should be seen.