Run Time Error 94

[NandaTC]

The reference sets which are empty is causing the run time error '94' , Invalid use of Null.
The issue is happening for both update and retrieve options.

Tried to debug but unable to find the cause and the debug options hits the below block of code.

If Response.StatusCode <> Ok Then
    If IsEmpty(Response) Then
          MsgBox Response.StatusDescription
    Else
          MsgBox Response.Data("message")
    End If
          Exit Sub
End If