There are at least 5 of these near the top of the damaged message stack. e.g. /damaged/359718

MISSING_MANDATORY_DATA FAILED TO RENDER HTML EMAIL because of missing parameters recipient_address in thank_you_send_mail

The weird thing is that the message has a very valid-looking email attached to it. The contact and the initial one-time donation record are there, but the recurring donation seems to have been rolled back due to this exception.