VBA - Combine sheets in different files into workbook

Sub CombineFiles()

Application.ScreenUpdating = False
Application.DisplayStatusBar = False
Application.EnableEvents = False
ActiveSheet.DisplayPageBreaks = False

'Declare variables
Dim path As String
Dim fileName As String
Dim wkb As Workbook
Dim ws As Worksheet
Dim sheetName As String

'Set the file path. Enter User in blank
path = "C:\Users\Intern\Desktop\Test"
fileName = Dir(path & "\*.xlsx", vbNormal)

'Loop through folder, open each workbook, copy the worksheet to the active worksheet, and close the workbook
Do Until fileName = ""
    Set wkb = Workbooks.Open(fileName:=path & "\" & fileName)
    For Each ws In wkb.Worksheets
        ws.Name = Left(fileName, InStr(fileName, ".") - 1)
        ws.Copy After:=ThisWorkbook.Sheets(ThisWorkbook.Sheets.Count)
    Next ws
    wkb.Close False
    fileName = Dir()
Loop

Application.ScreenUpdating = True
Application.DisplayStatusBar = True
Application.EnableEvents = True
ActiveSheet.DisplayPageBreaks = True


End Sub

I have a folder of different workbooks and I am trying to copy them all into one. I keep getting the error "Method 'Copy' of object'_Worksheet' failed" and I'm not sure how to fix it. This error comes up on the line:

ws.Copy After:=ThisWorkbook.Sheets(ThisWorkbook.Sheets.Count)

Thanks