I am running v2020 PU 1 and I while I experience similar unexplained results, there is a work around.
From the Help Text
Clear Credit Cards Expired on or Before
Enter a date in this field to clear credit card that expired on or before the entered date. This field defaults to the Accounts Receivable module date; however, any date up to and including the current period's ending date can be entered in this field . Click the Calendar button to select a date from the calendar.
This field is available only if Credit Cards or Credit Cards and ACH is selected in the Enable Payments field in Company Maintenance and the Clear Expired Credit Cards check box is selected.
First of all, the default date appearing for me WAS the AR module date. As noted, the system date is today (10/16/20), IF I changed the date, I did get the error you noted. IF I accepted the default date, the program ran.
Won't comment on the genius aspect of it, as we are all aware of Sage's quirkiness. After all, they did finally address the default year issue when you keyed 12xx in January of the following year. But the way the document date warning was fixed is that you did have to stay somewhat current with closing instead of just fixing the date. But that is another pet peeve.
------------------------------
Jeff Schwenk
FORMER 90M Board Member
Bottomline Software, Inc.
Waynesboro VA
540-221-4444
------------------------------