Frequent "QuickLookSatellite Quit Unexpectedly" errors

Hi–

I’ve been trying out Scapple to see if I want to buy it. So far, so good, except that I keep getting these errors saying that QuickLookSatellite has quit while I’m working in Scapple. I reset my computer, and I also reinstalled Scapple, but there’s no difference. I’m currently on MacOS 10.13.6. Any help would be appreciated!