That happened to me one time with a non-finance question. Apparently my answer had more digits in it than they had planned for... and the error message came across as very judgmental. It went something like -
Q: How many times a year do you attend cultural activities such as plays, museums, concerts, etc.?
Error: <200> IS TOO HIGH!
Me: Um... sorry? :-(
MMMers live unusual lives, outside the bounds of normal social expectations, I guess. ;-) I sent them a screenshot and they laughed and apologized for underestimating their customers, and updated it to accept more digits.