You are not running your eclipse instance with Java8. The JavaFX tooling is disabled because of this.Make Java8 the default system java or adjust your eclipse.ini to pass -vm pointing to your Java8 install.
I have the latest JDK with Java 8 installed and it works perfectly for any other method or program in my application. However, when I try to install this plugin, I get the previous error.
I am running Mac OSX Yosemite with Eclipse Luna.
Any suggestions? Thank you!
I decided to simply download the Eclipse that is bundled with this plugin from:
http://efxclipse.bestsolution.at/install.html#all-in-one It works fine and recognizes my Java 8.