Let's resolve the error you're having to log in successfully using the QuickBooks App, @userbuild.
Try to log in to your account in the web using this link and check if you can log in successfully. If there's no error, then I suggest resetting your QuickBooks Online app.
Let me walk you through how:
- Click Help at the top.
- Selecting Reset App Data.
- Then, close and re-open the app and try signing in again.
If the error persist, I suggest uninstalling the QuickBooks Online desktop app and then reinstalling it. Check this article for more information: QuickBooks App for Windows and Mac: General support.
I'll be right here to continue helping if you have any other concerns or questions about QuickBooks App. I'm always happy to help.