I can help in resolving the error you have with your bank account, @BookkeepingLaura.

You can resolve this online banking error by finding and removing the non-printable characters inside your QuickBooks account. 

First, make sure to create a backup of your QuickBooks Desktop company file so you can restore your data if you ever run into problems. Then, switch to Single User Mode. You can go to the File menu and click on Switch to Single User Mode.

Once done, follow the steps below on how to switch to Register Mode. This uses the account register to add or match transactions.

1. Go to the Edit menu and click on Preferences.
2. Select Checking and choose the Company Preferences tab.
3. Under the Bank Feeds section, switch to Classic Mode (Register Mode).
4. Click OK. 

You can now find and remove all non-printable characters. These non-printable characters may occur in any of these names:

• Chart of Accounts names
• Customer and Jobs names
• Vendor names
• Employee names
• Other names

These non-printable characters are those that are not available on a computer’s keyboard. You can now open each list of names, edit, and remove the non-printable character. After resolving the errors with non-printable characters, you can now switch back to Express mode.

See this switch between banking modes article for more information. Also, here's how to fix OL and OLSU Bank Feeds errors in QuickBooks Desktop.

I'm always here if you need more help with your bank connection. I'm always here to help. Have a wonderful day!