Hello,
I am getting the same error too, I made sure to download Java version 7, I have activated the add-ons on internet explorer, made sure scripting was enabled for internet explorer. Uninstalled and reinstalled numerous times, made sure the box was checked for 'enable java on browsers' in the java control panel, I've tried it on IE, Firefox, and Edge. Also have tried this on two different computers, when I have java version 8 installed it looks like it will work but then it just goes to a white screen, if I have java version 7 installed I get this message when I try to launch whatifsports play live
"Your browser does not support java applets, or java is not enabled."
I'm really unsure as to what else I can try, does anyone have an idea?