jibri: No "Start Live Stream" option and cannot install module snd-aloop

I’ve followed the install instructions https://github.com/jitsi/jibri#installing-jibri on xenial:

sam@AVJitsyServer:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 16.04.4 LTS
Release:	16.04
Codename:	xenial

and I have two problems:

1. the “Start Live Stream” option does not show up
2. I was unable to install the snd-aloop module

I was hoping that adding the following to the jitsi config:

    // Recording

    // Whether to enable recording or not.
    enableRecording: true,

    // Type for recording: one of jibri or jirecon.
    recordingType: 'jibri',

    // Misc
    hiddenDomain: 'recorder.www.jitsi.agileventures.org',

would at least allow me to see the “Start Live Stream” button in our jitsi’s but not so far …

Other changes to the config file such as disabling screenshare have an immediate effect when the jitsi interface is reloaded, but not enableRecording …

I did ultimately manage to complete every other part of the jibri set up with the exception of installing the snd-aloop module:

sam@AVJitsyServer:~$ sudo apt-get install linux-image-extra-virtual
... successful install
sam@AVJitsyServer:~$ modprobe snd-aloop
modprobe: FATAL: Module snd-aloop not found in directory /lib/modules/4.13.0-1011-azure

I found a post that suggested installing linux-generic, but that didn’t help either:

sam@AVJitsyServer:~$ sudo apt install linux-generic
... successful install
sam@AVJitsyServer:~$ modinfo snd-aloop
modinfo: ERROR: Module snd-aloop not found.

I also reviewed the community mailing lists, but while I found lots of posts on problems setting up jibri. e.g. https://community.jitsi.org/t/jitsi-users-jibri/13827/5, I didn’t find any for these two particular ones of the “start live stream” button not showing up at all, and the inability to install snd-aloop.

Here’s our current jibri config:

https://gist.github.com/tansaku/7630dfc7bbcdd38da5dd498a52c76b9d

Here’s a tail of the latest jibri logs:

https://gist.github.com/tansaku/90a8884b88160c30f0fe9ce29c9e98b8

I’m very happy to provide other logs and configs if that will help. Many thanks in advance