Let's get your bank transactions to show so you can get back to business, @nbaig-baiglaw-co.
Before we start, may I know what bank is connected to your QuickBooks Online (QBO) account? Any additional information would help us verify if there's an issue with the bank.
In the meantime, let's manually update your bank account to download the missing bank transactions. This will help refresh the connection between your bank and QuickBooks. Here's how:
Click Banking/Transactions from the left menu.
Select the bank account with missing transactions.
From the top-right of the page, click the Update button.
If you have successfully downloaded all your bank transactions, you may want to categorize and match them. This will help make sure your transactions are in the correct accounts when adding them to QuickBooks.
Should you need any additional assistance while managing your bank transactions, you can leave a comment below. I'll be sure to get back to you, @nbaig-baiglaw-co.
Utilize the trial version of MT Online to isolate the issue. It is designed to import into any bank or credit card in QuickBooks Online, so there is no specific setting needed. If the same error persists, there is an ongoing problem at your bank or connection.