Error 507/107 When Adding or Updating an Account

Overview

This error occurs when the wrong instance of your financial institution is selected while adding an account to Quicken, or if something is changed in the account while updating it. Example: Adding an investment account but selecting the bank card services instance as the financial institution.  

or

To resolve this issue:

You will need to start the Add Account process again and select the correct instance of your bank for the type of account you are adding.