I'm back again, but still having the issue. I've double checked and everything looks like it is installed in the correct location. There is one folder called charter in core/, a folder called Charter in core/modules/, a folder called charter in core/templates/, and the last is charter in lib/images/. The only other thing I can think of is that I don't have any flights yet. Could that be causing this?
I've also attached a screenshot of the webpage.