You can resolve error 324 by clicking on the Fix It link that is displayed after the error message and following the steps to select your updated account with the financial institution.
To resolve error 106, first make sure you're able to access all your accounts through the link your bank or credit card company provided to the online banking service by following these steps:
Choose Transactions > Banking.
Click Add account.
Enter your bank's name in the box and click Search.
Under All matching results, click the link for your bank.
On the next page click on the web site link for your bank directly under the bank's name.
Your bank's website will load in a separate window; make sure you're able to log in and access your accounts. Confirm that you can see your account summary, account history, and account details without any errors.
If you're able to log in and access your information, log out from the bank's site and close the browser window.
Next, try doing a manual update. You can do a manual update by selecting the Bank Account> Update> Update Now. Repeating this process 3-4 times usually allows you to update your account.
For more support services and assistance to your errors and queries, dial our QuickBooks Online customer service phone number +1–844–551–9757.