In case you are trying to update the bank account and facing issues, you can simply update the account as it will refresh the connection between the software and bank account. Have a look at the process of updating your account:
• Open the QuickBooks accounting software
• Head to the Banking menu
• You need to select credit cards and banks
• Then, click on the account from the available list
• Finally, tap on Update
If you are still encountering the error, you can speak to the experts at QuickBooks customer service number and take help from them.