I figured it out and it’s the WEIRDEST thing. I’m hoping @shotcut can explain it. I have a dual monitor set up. When I move the Shotcut window on the primary monitor, the white balance filter works. Upon dragging the window into my second monitor, it does the black screen error.
Is that a driver thing? That just doesn’t make sense to me, but it’s clear to me that it won’t work on that second monitor.