Uncaught [object Object]

Uncaught [object Object]

Hi, 
I am getting the following error when code access CryptoJS.AES.encrypt(data, key);

Uncaught [object Object]

What should I look at in order to fix it?


Additional info:
Uncaught [object Object] 
(anonymous function)
jQuery.extend.proxy.proxy
jQuery.Callbacks.fire
jQuery.Callbacks.self.fireWith
done
jQuery.ajaxTransport.send.callback