OK, thanks for posting the outstanding transactions as that is very useful.

I see the Adjustment was posted and not applied to the outstanding invoices. This means that transactions have a Current amount not equal to zero, and need to be applied to something before they can be cleared. If indeed the Current Amounts are non-zero, you could create a zero-dollar manual check payment (non-printed), and select the two invoices and adjustment to apply to.

After posting this zero-dollar manual check, this should set the Current Amount of all the indicated transactions to zero.

If this seems a little complicated, you might want to connect with your company's Adagio consultant, just in case.