Right click your taskbar and select panel preferences. In the Geometry tab there is a width attribute. I needed to make my taskbar disappear so I dragged width to 0. Now I seemingly have no taskbar, which was great.
Now I want to undo what I have done... and I don't have a taskbar to right click on anymore. There has to be some sort of fix for this be it opening taskbar settings through command line... reinstalling something to get the default or editing some file somewhere.
I've try desktop settings and restoring to default. I've tried change the task bar to large medium and small. Unfortunately all of that doesn't change the 0 width parameter.