VBA Excel AutoFilter Error - vba

Question

I am getting following error when trying to auto filter in vba:
The object invoked has disconnected from its clients.
So what i am trying to do is auto filter, search for empty spaces and delete the rows. Can anyone please help?
I have tried the standard solutions provided online e.g. option explicit etc but to no avail.
Data:
Code:
Private Sub Worksheet_Change(ByVal Target As Range)
Dim lngLastRow As Long
Dim lngLastRowD As Long
Application.ScreenUpdating = False
'Concatenate the Row A and B
lngLastRow = Cells(Rows.Count, "A").End(xlUp).Row
Worksheets(1).Range("D2:D" & lngLastRow).Value = Evaluate("=A2:A" & lngLastRow & "&""""&" & "B2:B" & lngLastRow)
lngLastRowD = Worksheets(1).Cells(Rows.Count, "D").End(xlUp).Row
Set ws = Worksheets(1)
Set Rng = Worksheets(1).Range("A2:A" & lngLastRowD)
With Rng
.AutoFilter field:=1, Criteria1:=""
.Offset(1, 0).SpecialCells(xlCellTypeVisible).EntireRow.Delete
End With
ws.AutoFilterMode = False
Application.ScreenUpdating = True
ThisWorkbook.Sheets(1).Range("A2").Select
End Sub

Answer 1

Since Worksheets() want the name of the sheet, like "Sheet1", use sheets(1).
Why are you creating the variable ws and rng when you only use them once
I ran this and it deleted rows with no data in column A.
Private Sub Worksheet_Change()
Dim lngLastRow As Long
Dim lngLastRowD As Long
Application.ScreenUpdating = False
'Concatenate the Row A and B
lngLastRow = Cells(Rows.Count, "A").End(xlUp).Row
sheets(1).Range("D2:D" & lngLastRow).Value = Evaluate("=A2:A" & lngLastRow & "&""""&" & "B2:B" & lngLastRow)
lngLastRowD = Worksheets(1).Cells(Rows.Count, "D").End(xlUp).Row
With sheets(1).Range("A2:A" & lngLastRowD)
.AutoFilter field:=1, Criteria1:=""
.Offset(1, 0).SpecialCells(xlCellTypeVisible).EntireRow.Delete
End With
sheets(1).AutoFilterMode = False
Application.ScreenUpdating = True
Sheets(1).Range("A2").Select
End Sub

Answer 2

In the end i restored in approaching the issue from another angle:
Dim i As Integer, counter As Integer
i = 2
For counter = 1 To lngLastRowD
If Worksheets(1).Range("A2:A" & lngLastRowD).Cells(i) = "" And Worksheets(1).Range("D2:D" & lngLastRowD).Cells(i) <> "" Then
Worksheets(1).Range("A2:A" & lngLastRowD).Range("A" & i & ":D" & lngLastRowD).Select
Selection.Delete
GoTo TheEND
Else
i = i + 1
Debug.Print "i is " & i
End If
Next