(this forum needs an Edit post feature...)

By twice on the webpage, I mean that there are 2 Java dialog boxes on the webpage with this same error. I'm guessing that the first is the java3d.jar and the second is the SweetHome3DViewer.jar files creating these error.

Once I click "allow Applet to run", I no longer get the error in future uses of the site, but I need to do this with all the Java 8 machines I have.