Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: 19bd99a1-491a-e014-594a-3e817e4cbc40.

Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: 19bd99a1-491a-e014-594a-3e817e4cbc40.