Syncing fails for msufcu.org -- I think its new system is responsible

My bank (Michigan State University Federal Credit Union, www.msufcu.org) has just switched to a "new vendor for the service that is used to connect Quicken/MS Money to your MSUFCU accounts". Probably not coincidentally, my Buxfer accounts no longer sync -- instead an error appears saying "Sorry, the financial institution returned an error message:
A system error has occurred."

Here is the page with the change notification, along with links to tutorials of how to fix things for Quicken or MSMoney accounts; I hope these will be helpful in figuring out how to make Buxfer behave again: https://www.msufcu.org/c_pfm.html

(By the way, I find it very annoying that I have to post this in a public space, revealing more about myself than I'd really like to, just to get some prompt attention. I tried my shiny "Priority Support" button but have received no reply, not even an acknowledgment.)