I am also having this issue. Trying to use Quickbooks' Payment Links feature, but on the receiving end, my customers cannot send payment. I've tested with three known-good bank accounts with plenty of funds, tried clearing my cache and incognito modes for Firefox, Chrome, and Safari, and it still gives me the same error every time:

 What recourse is there? I've tried every suggestion posted in this thread. This error is holding up thousands of dollars of revenue for my company.