I'm having the same problem Mike describes trying to use either Warp or the newer Kaleidoscope.
The symptom is as follows: I apply something like Butterfly and then either effect on top of it and it will not render on the House Preview or Model Preview. The fields are black. If I remove either Warp or the newer Kaleidoscope the symptom remains. If I try to render it locks up Xlights. Does not crash.
See attached logs, video, and .xml file
I’m using Windows 7 version 2019-14 64-bit on a Dell Latitude E7450
Thanks for any insight that might get these great new effects to work.