It's nice to have you as part of the conversation, @tsalv,
Allow me to join this thread and share some helpful steps to get past the banking error 103 you're getting.
@Syro shared a great resolution which you might want to try first. Once done, update your bank log in inside your QBO account. Follow the steps below:
Please take note that if you're still getting the same error, click Go Back, and repeat the steps with a different bank name from the list.
You can refer to this article, if you can't still connect to your bank: How to fix banking error 103
That should do it. Please keep me posted on the outcome. I look forward to your response on this, as I want to ensure you're all taken care of. Have a great day!