Hello Exmoorfuels,
Error 571 means that you have either closed the consent page while connecting to Open Banking in QuickBooks, of you may have pop-up blockers on your browser that are active. This prevents you from completing the setup and proceeding to the transaction page.
To resolve this issue, disable the pop-up blockers on your browser and try to connect again. Alternatively, refresh the page to allow for the consent page to fully load.
