Hello there, Tryna.
In QuickBooks, there are several factors that could prevent the reconciliation process from proceeding successfully.
To better assist you, could you please clarify what you mean by "reconciliation won't work"? What seems to be preventing you from reconciling? Additionally, could you elaborate on what you mean by "Client's version isn't Pro"? Understanding these aspects will help me provide an accurate solution to your concern.
If the issue involves a discrepancy in balances, QuickBooks typically displays a message stating. "We can help you fix it". Clicking this will generate a Reconciliation Discrepancy Report, which highlights added, edited, or deleted transactions, helping you identify and correct the discrepancy.

If you're concern is about something other than discrepancies, I will recommend reviewing the following articles for guidance tailored to your situation:
If you have follow-up questions or need further clarification, feel free to reply using the Reply button below.