Issue adding second credit card connection to budget

My wife has a credit card with the same bank I have a credit card with, but our accounts are separate because we got them way back before we met. Whenever I try to add the connection to her bank I get an error "Uh-oh! Something has gone wrong likely having to do with internets and tubes. Refresh your browser to get back in business."

My assumption is that YNAB sees it already has a connection to the bank and doesn't want to add a separate connection to the same bank, despite the different account information. Anybody have thoughts on what is going on? Any way to get some actual useful information from this error message?