I have the same problem: when trying to withdraw btsx a system error message pops up over and over again. What should I do to stop it?
That's happened to me before using btc38... I think it was solved when I did not include a memo.
OK, but how do I stop those error messages? They keep popping up and this prevents me from doing anything.
Also, I've tried different browsers and refreshing the web page - it does not help.
EDIT: With the assistance of btc38 help-desk I eventually managed to withdraw my btsx. But still don't know what the problem was.