Ubuntu – Upgraded Ubuntu 15.04 to 15.10, and Unity graphical elements not showing up

I just upgraded to Ubuntu 15.10 from 15.04.

Problems:

• The Unity sidebar and top bar are nowhere to be found.
  No matter if I push the cursor against the screen border.
  • The Unity top bar only appears when logging in. Fully interactive, functionality intact.
  • The Unity side bar is nowhere to be found. I never see it.
• Another notable missing feature is ES-EN keyboard switching with Super+Space. I assume since it's part of the top bar.

Every other program seems to be working properly.

Also, I have the Variety wallpaper changer installed (still works), and think it could be a possible culprit.

I have tried:

• Restarting.
• Restarting Unity as shown in this answer.
• Opening up the unity-tweak-tool and resetting all tabs to normal. I had a retractable/hidden side bar before the upgrade, but toggling this feature doesn't help.
• Running sudo apt-get upgrade in case any packages were missing, to no avail.

I've managed to get by with Ctrl+Alt+T for opening up the terminal and Alt+Tab to change between opened program windows, but it's fairly uncomfortable.

Any ideas or assistance would be appreciated.