Hello Nav3,
Welcome to Community! Getting an error message while performing your reconciliation in QuickBooks Online, is rather concerning. I would be glad to assist!
If you haven't done so already, I suggest clearing cache on your browser. This will help to improve system performance and loading times. In addition, I recommend trying another browser such as Firefox, Edge, Google Chrome, Safari, or a private/incognito window.
Should the issue persist, please contact us outside of Community. It would be our pleasure to work with you in real time and ensure you're able to reconcile your account without delay!
Feel free to reach out again, if you have any other questions. We would be happy to help!
