Live demo error

The calendar template live demo is with the error:
ASP error happened

Technical information

Error number 94

Error description Invalid use of Null

URL /calendar/asp/Monthly_list.asp

SQL query select [id], [DateField], [Description], [Theme], [TimeField], [Category], [EndTime], [DayEvent], [EndDate], [Period], [Recurrence] FROM [Calendar] ORDER BY [DateField] ASC

Solution