Getting this error when hitting practice button:

Error: Server Error

The server encountered an error and could not complete your request.
If the problem persists, please report your problem and mention this error message and the query that caused it.

There have been a lot of server errors today. Guess it is the Google app engine having problem again. Try again later or try the skritter.cn address instead. I have had more success with that today. Both have however had a very bad day with a lot of 500 errors, delays etc. Think I am down to only half the time i planned for today.

Yes, these errors are becoming more numerous and are starting to interfere with my planned study time. I haven't had problems yet today, but I've had plenty over the past week.

seems only .cn working again...something wrong with .com

@jcdoss
this happened recently too, in the previous post they mentioned some server outage. I'm not sure if it's affecting the .cn too because the .cn site is a bit laggy

Sorry guys. I am really pulling for the next App Engine release, which should help us fix a bunch of these issues. I've added an extra time to y'all's accounts, since you couldn't access the site to practice. This sucks!

It does indeed, same issues here from Beijing. Switched to .com a few times but both produce 500 errors and are extremely slow. There is a significant lag after finishing a character, till you can input the next one.

Often I restart the practice session but I am not sure this really helps. It is slower than usual the past week till now.

I've enabled a couple changes that I hope will improve the server recovering from lag spikes like this. It hasn't fixed the problem, but time will tell whether it has some effect. There might be a couple other drastic changes we could make to help improve reliability if this doesn't help...