WARNING: Port 443 of computer does not appear to be accessible, but web page is ok

sorry for late reply, i was off the grid and forums for a while, feels good, but i tried to fix email problems before i left, but i still got error 502 while acessing the forum.

sorry I explained wrongly, i don’t need worpress on same server, it was just to take an example of what you couldn’t do.
In fact I just have 4 domains that points to simple web site on this server.
the discourse doctor doesn’t seem to have errors
but i still get error 502 on the forum domain
do i need to instal haProxy like they say here? Thanks