Cannot enable Java in Safari

I have the following running on my Mac:

• OSX Yosemite (10.10.2)


• Java version 8 update 31


• Safari 8.0.4

I am unable to run any Java applet on Safari. I have added multiple sites to the exception lists (in System Preferences -> Java Control Panel -> Security), but it has not changed anything.

I also don't see anything related to Java in Safari preferences:

When I try to run a Java applet, it says, Error. Click for details., and when I do, this is what I get:

I've tried Chrome and Firefox as well, and this is the common error they give me:

Whatever I do, I cannot allow for Java applets to be run on any browser.