Empty error message in insert procedure transformation

When creating a virtual insert procedure and omitting a non-nullable column from the insert, the error message is simply

ERROR: ERROR

E. g. I have a PUBLISHERS table with three columns, of which PUBLISHER_ID is NOT NULL, the insert procedure is

FOR EACH ROW
BEGIN ATOMIC
	INSERT INTO Books.PUBLISHERS (Books.PUBLISHERS.NAME) VALUES ("NEW".NAME);
END

The error in previous versions of Designer for the same procedure would be

ERROR: Element Books.PUBLISHERS.PUBLISHER_ID of books.publishers is neither nullable nor has a default value. A value must be specified in the insert.