I had the same question, but I see Quickbooks did not actually give you an answer..

The URL in Quickbooks is not correct anymore. You need to change www.prospera.ca to two different URL's, depending on which digits the bank card starts with. Fo...

First off, I have already tried all fixes I can find. Secondly, my bank updated their website recently, and you have 2 options to choose from before the actual ...

I have had the same issue for a month now, and got the same response from QBO that engineers are on it.