Hello there, nicola19. I understand the importance of connecting your bank to QuickBooks Online (QBO). I'm here to help you figure this out so you can continue with your tasks.

As per checking here on my end, there's no reported connection issue with your bank institution. May I know if you encounter a specific error message, so we can check further and provide the exact resolution to this concern. You can also perform some troubleshooting steps based on the error message you encounter in this article: Open Banking connection errors in QuickBooks Online.

I've also added this article as your guide in this article in managing online banking in QBO: Online Banking guide for QuickBooks Online.

You may also check your bank website to see if there's any service maintenance since you're unable to connect with your bank.

Please let me know in the comment section if you need further assistance with managing your bank in QBO. I'll be around. Take care!