Plex Server doesn't run anymore all of a sudden? Ubuntu 16.04.1 LTS

I'm running Ubuntu 16.04 LTS

stark@FRIDAY:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.1 LTS
Release:    16.04
Codename:   xenial

Plex was up and running just fine until yesterday when I did some updates available in Ubuntu Software and rebooted. I saw this morning that I can't connect to my Plex server anymore. On the actual Ubuntu machine, I also can't connect to http://localhost:32400/.

I figured that the service might not have started on its own after the update, so I tried starting it manually:

stark@FRIDAY:~$ sudo service plexmediaserver stop
stark@FRIDAY:~$ sudo service plexmediaserver start
stark@FRIDAY:~$ 

I didn't get any errors, but I still couldn't connect. When I check if the service is running, it doesn't seem to be the case:

stark@FRIDAY:~$ service --status-all | grep plex
stark@FRIDAY:~$ 

So I'm a bit at a loss here as to what could be wrong. Do I need to reinstall PMS completely?

Any help would be appreciated.