Sorter Errors - Reduced to Unusability

Hi all. I really, really like DTP. Sorter is a godsend… except when it doesn’t work.

Every time I drop something to the Inbox, or about half the other sorter groups I’m using (database inboxes or groups), it will give this same error.

As you can imagine, this makes the software unusable and I can’t figure out how to fix it, bringing me here.

Thanks for any help.
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Please start a Support Ticket.