Error 400 displayed after opening a workbook

Hello,

When trying to open a workbook the 400 error is beïng displayed.
I have tried to catch the error with the On Error possibilities, but to no effect.

The xlsm file is macro enabeled and password protected

Public Function Process_Files(Array_ID As Integer) As Boolean

    Dim WB As Workbook
    
    Application.DisplayAlerts = False
    Application.EnableEvents = False
    Application.EnableCancelKey = xlDisabled
       
    ' Openen van het inputbestand
    On Error Resume Next
      Set WB = Application.Workbooks.Open(Input_Folder & "\" & FileArray(Array_ID), True, False, , "***", "***", , , , True)

    If Err.Number <> 0 Then
      Process_Files = False
      Exit Function
    End If

...

End Function

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