I put the Kaliedoscope effect on a strand of lights (dragged and dropped), 3 strands in a column 50 lights on each strand and Xlights crashed. I'm using 2019.13. I attached the crash log. It's never crashed since then, but anytime I put the Kaliedoscope effect on any model, nothing shows up on either the model or on my whole house model. I just have a black screen on the preview screen.