On a localhost installation of webMathematica (with Mathematica 12.0 as engine) under macOS Mojave 10.14.4, and using tomcat 9.0.1, I can run the supplied examples except those that create 3D graphics, e.g., "Live 3D Plotting" and "Polyedron Explorer".
When in Safari I press a button to do an evaluation, etc. for one of these 3D graphics apps, I get an "Unsupported Plug-in" error where the 3D graphic should appear.
What plug-in would this be, and how can the error be fixed?
