Has it happened to you?
An ERROR has occurred.
not overly helpful is it? anyway, i have never gotten that. i suppose you have tried the standard clearing cache type stuff. i think TT is java based so you may want to see if there is an update for that. beyond that i will be of no assistance.
perhaps you should move this to help and support, or contact chess.com directly.

Why do I keep getting that message when I try to do the Tactics trainer?
Probably because an error has occurred.

Why do I keep getting that message when I try to do the Tactics trainer?
Probably because an error has occurred.
Brilliant!!!!!!

not overly helpful is it? anyway, i have never gotten that. i suppose you have tried the standard clearing cache type stuff. i think TT is java based so you may want to see if there is an update for that. beyond that i will be of no assistance.
perhaps you should move this to help and support, or contact chess.com directly.
It finally stopped.

Next time try telling people what browser & OS you were using. You could also try using a different browser and see if the problem still occurs, after clearing the cache in your default browser, which you should be doing routinely anyway.
Standard troubleshooting procedures include clearing the cache, closing and re-opening the same browser; rebooting the PC; using a different browser, and posting tech questions in the Help & Support forum.
To err is human, to really foul things up requires a computer. ~Bill Vaughan, 1969
not overly helpful is it? anyway, i have never gotten that. i suppose you have tried the standard clearing cache type stuff. i think TT is java based so you may want to see if there is an update for that. beyond that i will be of no assistance.
perhaps you should move this to help and support, or contact chess.com directly.
It finally stopped.
happy to help :)

Microbe is usually right. He knows his stuff on this site.
I'll bet an error occurred too.
possibly the error was in the user not deleting cache or using a web browser that doesn't work well all the time with this site.
I don't have problems using firefox, and have heard chrome works fine too. But I still find occasional errors - and after I delete cache and browsing history, clears the problems just fine.
regards,
I'll give it try, though I'm pretty computer illiterate. I'm using IE 8.

please go to
http://www.mozilla.com/en-US/firefox/new/?from=getfirefox
and download and install the webbrowser. it is free, safe and works fine with chess.com
that may help with most problems, although you still need to clear cache and history occasionally (once a week is good) it certainly will help if you play live chess online here.
How do you clear the cache?
Why do I keep getting that message when I try to do the Tactics trainer?