V2020.0.41 is not rendering shadows correctly. Cast shadows is enabled for the .skp and .gltf objects. Shadow "drawing distance" varies when zoom of the fixture is altered. Material on floor is the built-in "Grey, light-matte".
Could you share more information and even a screenshot of the issue you are having?
Oh I thought I had uploaded photos.
Here is a link to photos with the fixture at at 3 different zoom values.
https://imgur.com/a/o7D4s6v
What more can I say? I have 2x GTX 1080 TI's running and capture set to Ultra rendering settings. Model for the stage is a .dwg exported from wysiwyg, set was .skp from sketchup and actors are .gltf(left guy) and .skp (right guy). If I move them futher back, the shadows appear, but seem to cut off at some invisible line, but that line varies between zoom values.
You could send your project file with some recorded snapshots of the problem to support@capture.se in order to receive personal assistance.