Pivot Table Script Change

I have this pivot table script that was working fine in another workbook.

But then I needed it to run only on the last sheet of another workbook. So I took out "For each ws in worksheets" now I am getting an error "object variable or with block not set"

Not sure what happend?

Any Idea's?

Here is the code, Thanks for helping, Mike

Sub Pivot2()

    Dim Ws As Worksheet, strSource As String
    Dim PT As PivotTable, pc As PivotCache, pf As PivotField
    
     With ActiveWorkbook.Worksheets(Sheets.Count)
       
        
            'For Each Ws In ActiveWorkbook.Worksheets
         ActiveWorkbook.ShowPivotTableFieldList = False
         Application.CommandBars("PivotTable").Visible = False
         Application.DisplayAlerts = False
         Application.ScreenUpdating = False


        strSource = Ws.Name & "!R1C1:R5000C4"
        ActiveWorkbook.Worksheets.Add      'new worksheet becomes the active sheet
        'ActiveSheet.Name = "Info"
        
        Set pc = ActiveWorkbook.PivotCaches.Add(xlDatabase, strSource)
        Set PT = pc.CreatePivotTable(Range("A1"))   'pivot table at A1 on new sheet
        
        Set pf = PT.PivotFields("Order Number")

        PT.AddDataField pf, "Count of Order Number", xlCount
        PT.AddFields RowFields:="Name"
        Application.DisplayAlerts = True
        Application.ScreenUpdating = True
                'Next Ws
    
     End With
          
End Sub