Getting QuickBooks Error 9999 when updating banking transactions in QuickBooks Online? This means your connection to the bank server failed or timed out. We’ve compiled practical fixes like reconnecting your account, using the QuickBooks Online Sync Tool, and checking browser compatibility settings. Join discussions with users who overcame identical issues affecting their daily transaction imports. Learn how clearing cookies and reconnecting accounts can restore normal banking feed updates. Call +1-866-408-0444 to get expert advice for complex connection failures.