Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: b3b56fa1-b9ac-e014-6eb5-310c8ad2266e.

Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: b3b56fa1-b9ac-e014-6eb5-310c8ad2266e.