QB Issue Resolution:

As long as you have a bank statement that you can compare the transactions in QuickBooks with, you can reconcile the account. There’s a resource that contains multiple articles to troubleshoot reconcile issues that I recommend: Reconcile Hub.

Resolution for Issue 'How to reconcile a old account?' available: Yes (Solved).
Source: Intuit Community forum.

How to reconcile a old account?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Bank Statement
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Error Recovery for Bank Statement [Canada]
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