Filenames not showing up at the top

Hey folks! I'm running the latest version of Webstorm for Ubuntu and I'm facing a weird issue. Somehow the filenames at the top are not showing up. This is what it looks like:

As you can see, I can see that there's a "selected" file, however, I cannot see its name. And, to make it worse I cannot see any of the files that I have open. I can click on them, but I don't know which file I'm clicking on.

Any idea on how to fix this?