Hi @Anonymous,
It's my priority to get this resolved for you. With that said, let me point you in the right direction.
The fastest way to get this resolved is to speak with our technical support team. They can pull up your account in a secure environment, and with your permission, remotely access your computer screen so they can investigate the cause of this issue, and then fix it for you.
If you want to learn how to troubleshoot a reconciliation when the opening balance is correct, you can view the article provided. it's intended for situations where your QuickBooks Online bank account opening balance matches your actual online bank, but you're still getting error messages in the reconciliation screen.
Please feel free to leave a comment below if you have any other questions.