Java appet error java.lang.noclassdeffounderror

Hey all,

I have never heard of this error and no information i have found on this website has displayed this error

this error is very frustrating as one of the most common websites i have found that comes up for the computer i am using and it affects my computer that i am using the error is this

But what does this actually mean


As i have no control of it and there are no answers on the internet is there somthing i can do to fix this problem?

Not sure on where to post this so i hope some one can help me with this