What is a pledgepayer object?

Ange Scott

solved.

We have a donor that has set up a recurring gift via a NXT donation form. Her second payment has now come through and it's been applied to the Recurring Gift pledge. However when I try to open the Batch validation report in DBV, it won't open and comes up with this pop-up message:

What in the heck does that even mean? I've googled it and it just says it needs to be applied to the recurring gift, which it already has been. How do I get rid of this to stop it happening every time? We have another donor with a recurring gift via NXT forms and we never have this issue with those payments….