Yeah, this is being discussed in another thread. No fix atm, you'll just have to wait until the staff signs the app:
http://www.chess.com/forum/view/help-support/java-computer-doesnt-work
The best post is Post # 51 on page 3.
java
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Jan 17, 2014
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#3
java is a portable software development language and platform. Now, one normally frowns upon allowing some idiot on the web to install and run software on your machine, because they may be trying to steal your bank info or whatever, so such applications need to jump through some security hoops or your browser and PC will (rightly) reject the software as "dangerous".
You *could* fix the problem by cutting your security down to a level that allows the program to run. I strongly advise aganist this. You should instead wait for them to fix the issue --- its on the other end, not yours, and you should not do anything at all at this time.
wtf? I am 61 yrs old, very low-skill internet. I am trying to play vs. computer, recently (est. 4 days?) got message about java, secuirty blocked. <gasp> This has happened to me twice b4, I am SURE this has happened to someone else. Any recommendations? Thanx in advance.