Let me share an idea why you're getting Bank Error code 103, 5247719916784805.
I have here primary reasons why you receive such error:
For first time connection, make sure to select the correct bank and enter your bank login correctly.
Here's how to Fix Error 103 for new connections:
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 identify the correct bank.
You should be able to connect your bank after following these steps. I'll be around to help if you have additional questions.