Error message 108. My bank doesn't see an issue with my account as your warning message suggests. They are looking into it and have no idea what the issue is. Help!

Try opening your QBO account on any private/incognito browser.

Thanks for reaching out to the Community, @u1739176642. Let's work together to resolve bank error 108 in QuickBooks Online (QBO), so we can get back to downloading transactions seamlessly.

If we see error 108 when checking online banking, it merely indicates that your bank or credit card has posted a notice to their website. Messages, particularly those relating to updates, may prevent QBO from connecting. Since you've already reached out to your bank and confirmed there's no ongoing maintenance on their end, let's perform other troubleshooting options so we can download your latest bank transactions.

Before that, may I ask what specific bank account is affected? This way, we can update you if there's an in-progress investigation regarding your financial institution and provide you with workarounds, if there are any.

First, let's update your bank connections in QBO. Here's how:

1. From the Accountant view, go to Banking.
2. Select the Banking tab.
3. Click Update.

If the issue persists, I'd suggest manually importing transactions into QBO. Before doing so, let's open and review the file from your bank to ensure it's in the correct format. 

For more information on fixing bank errors, feel free to visit this link: What to do if you get a bank error or can't download transactions in QuickBooks Online.

Furthermore, it's recommended to reconcile your accounts monthly in QBO to ensure they match your bank statements. By doing so, we can guarantee that your books are balanced and accurate. 

Please don't hesitate to get back to us if you have clarifications fixing bank error 108. The Community is available 24/7 to assist you. Keep safe, and have a great day ahead!