Error: "26 SO_SalesOrderQuickPrint_UI.PVC 123" or Error: "26 SO_PickingSheetQuickPrint_ui.pvc 99"

SUGGESTED

Have a client working on upgrading from 2015 to 2019.  We are stuck on this error, although it is in Sales Order Printing, not Pick Sheet.  The ReportSetting record keeps getting corrupted with invalid data in the Message field.  We've tried clearing it out of the STANDARD record, and can print once successfully after that, but then it comes back and they error out on the second print.

I had this happen to me while testing a client upgrade, but the end user never had the issue once they went live.

Does anyone have any deeper insight into this error?