System Tray Icon Disappears after upgrade [Lubuntu 16.10 to 17.10]

Operating system and version: Lubuntu17.10 (post-upgrade)

The issue you are facing: System Tray Icon not appearing after upgrading lubuntu from 16.10 to 17.10

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

  1. Client runs fine on 16.10
  2. Upgrade to 17.10 through live-USB (not while running lubuntu locally)
  3. Reinstall nextcloud client (old config files still in place after upgrade)
  4. Nextcloud tray icon shows missing icon image instead of current server status

The output of your Nextcloud log in Admin > Logging: Doubt this is needed, works on other machines

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

Not sure where to find

The output of your Apache/nginx/system log in /var/log/____:

Too many files in there, none of which are related to Apache/nginx which one do you need?

Anyone?

Now I can’t even reach the cloud anymore. SSH still works.
Any Tutorials on how I can try to revert an upgrade? I suspect that the automatic updates broke NC.