Access/SQL query returning "invalid floating point operation"

Hi Experts,
The following query suddenly started returning that error message above

SELECT TmpEmpAvailSearch.* FROM TmpEmpAvailSearch
where  ID in (Select EmployeeID from TempPassThroughQry) And ID in (Select EmployeesID from TempPassThrough1Qry) And (MinSchedThisWeek < 2280 or MinSchedThisWeek is null) And Zip in (Select ZipTo from tblZipCodesDistanceQry)

 ORDER BY TmpEmpAvailSearch.LastName, TmpEmpAvailSearch.FirstName, TmpEmpAvailSearch.WeekDayOrder;

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See attached.
untitled.png