When customers attempt to update their online bank accounts with bank feeds, Quickbooks  Error Code 324. Only occurs when QuickBooks cannot locate your bank account on the bank's website. As mentioned above, this error happens often in QuickBooks, but it can also be dangerous since the program cannot identify your bank account if it cannot detect your bank account. In turn, you may negatively affect business operations and money management. There is also an Online error in QuickBooks, which may be related to the QuickBooks Online error code 9999.