I have the same problem; I followed the instructions, but mopidy won't run on my xenial-based libertine container. I tried running
phablet@ubuntu-phablet:~$ libertine-container-manager create -i lxc-experiment -t lxc -d bionic
to get a container based on a newer distribution, but that doesn't work:
libertine-container-manager:76: ERROR: create(): System kernel does not support lxc type containers. Please either use chroot or omit the -t option.
Not sure how to proceed; note that I'm making my first baby steps with ubuntu touch, so it's well possible that I messed up some initial step, making the guide non-appicable in the first place.