InDesign CS4 only shows gray empty surfaces
Hey, I got a new mac pro (early 2009) with a pre-installed licensed version of InDesign CS4. I updated the mac's software so it's High Sierra 10.13.3 now.
This is what it looks like when I start InDesign:

Has anybody had this issue? I've tried opening a new document but it only shows another gray window. When I open InDesign files they are displayed but I can't work on them.
