Hello Tpcreative can you please try clearing your cache and cookies to all time, close the browser down, reload it, log back in again try do the connection again. 

Just did that @Ashleigh1  but still getting the same error

Thanks so much for trying that are you able to send us a screenshot of what you get please and you can blank any information you don’t wish to share here thanks.  You can ring the support line  on 0808 234 5337 line is open mon to fri 8am to 7pm to do a screenhsare with the agent and it can be raised up if needs to as well. 

Hi - Co-op feed has stopped for ussince 1st Sep 23 - keep getting 355 error have disconnected and reconnected apparently successfully twice but as yet no joy getting new transactions

THanks

Ben Woodward 

Hi Ben, thanks for joining this thread. 

We're aware of a current issue with the Co-Operative Bank where some customer are receiving a 355 error response when connecting or updating their account in QB. 

Our team are currently working towards a solution and we're tracking this internally on the investigation with reference INV-92346. We've added you to this as an impacted user so that you'll receive all updated via email - thanks for your patience in the meantime! 

Can you also add myself as an impacted user for the Coop Bank Business account feed 355 issue?

Hi CortDev, thanks for notifying us that you're also experiencing this issue.

We've added you to the investigation and you'll receive all further updates via email. :)