Instead it reports:

Password could not be changed

Your system may not support changing passwords through TWiki. Check with your TWiki administrator.

Would be better to have a "current password doesn't match" error / perhaps a pointer to reset password page from the oops.

-- SP

There's a general policy not to provide information on the reason a login fails, to stop people who try and experiment with logins and passwords. I think the message is OK. Discarded.

CC