Cannot connect to mediaserver after Plex installation into a standard jail



I followed, scrupulously I thought, instructions for installing Plex as a media server in a jail in FREENAS. I called the mediaserver PLEX and assigned it an address of It all seemed to go error-free. When I tried to access it at, it timed out. I tried several different browsers, even tried deleting the jail and starting over from the beginning with no joy.
Is there a foolproof set of instructions to install PLEX on FreeNAS that a true idiot can follow? Or other suggestion? I had Plex working a couple of years ago but that was many versions of FreenNAS and PLEX ago.
Any help VERY MUCH appreciated.

System Information
Hostname freenas.local
Build FreeNAS-9.10.2-U6 (561f0d7a1)
Platform Intel(R) Core(TM) i3-4130 CPU @ 3.40GHz
Memory 16227MB
System Time Wed Mar 28 09:04:52 EDT 2018
Uptime 9:04AM up 1:56, 0 users
Load Average 0.09, 0.20, 0.16