Thanks for connecting with us here in the Community. Reconciliation can be a lengthy process and I'm glad you've reached out for help. QuickBooks provides the tools you need in order to accurately reconcile your accounts with peace of mind. I'll be happy to point you on the right path with this.
Based on what you've described, it's important I'm able to have a visual reference of what you're seeing on your end. To make sure I'm on the same page as you, could you describe more about what the error says? For reference, here's an article that shows you how to reconcile your accounts with ease: