This means you have a corrupted font that the printer can't display, even if you can use it within the application. My advice is to save the content you've created then go to C:\Windows\Fonts folder and manually delete it or replace the labels with another font.
Once the font has been deleted, use Google and search for another copy, but don't open the Studio just yet. Install the font and then reload the saved content and print it. It should work this way.