Hello, @Polymorph.

I appreciate you for trying the basic troubleshooting steps suggested by my peers above. 

At this point, I'd recommend contacting the QBSE Customer Care team to check what's causing this to happen. They can also help you submit a request to re-open the case to investigate the issue further. 

For future reference, read through this article: Upgrade your bank feed connection to Open Banking. It also includes answers to frequently asked questions about the new open banking regulations in QuickBooks. 

Let me know if you have additional questions. We're always delighted to help.