We have a weird issue here for a particular user. When they have their Digital Press (Which uses the Fiery) selected as default, open Adobe Illustrator, go to 'Print' and then choose 'Printing Preferences' they are given a blank window.

If they set another printer as default, open up Illustrator, print and choose the Digital Press, it all works fine.

Everything is updated on the Fiery side so I'm not sure what it could be. I thought I'd start here prior to opening up something with Adobe.