Ouverture de document word sur Sharepoint

Bonjour

Dans mon projet, j'essaie d'ouvrir un document sur sharepoint. En mode création, le document s'ouvre sans problème. Mais je quand déploie sur un serveur, il s'affiche l'erreur suivante:

Citation:

The property or field has not been initialized. It has not been requested or the request has not been executed. It may need to be explicitly requested.

voilà le code d'initialisation de sharepoint

Code:

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Public SiteURL As String = "https://regulation.sharepoint.com/sites/Esign"
Public folderUrl As String = "/sites/Esign/Documents%20partages"
Public SiteFolderUrl As String = "https://regulation.sharepoint.com/sites/Esign/Documents%20partages/"
Public ClientContext As SP.ClientContext = New SP.ClientContext(SiteURL)
Public oWebsite As SP.Web = ClientContext.Web
Public oFolder As SP.Folder = oWebsite.GetFolderByServerRelativeUrl(folderUrl)
 
Public Sub InitialisationSharepoint()
        Try
            ExecuteLmdMod("select * from a_parametrage")
            Dim username As String = bTabl.Rows(0).Item("SmtpLogin").ToString
            Dim password As String = bTabl.Rows(0).Item("SmtpPwd").ToString
            password = DeCrypte(password)
            Dim securedPassword As SecureString = New SecureString
 
            For Each c As Char In password.ToCharArray()
                securedPassword.AppendChar(c)
            Next
 
            ClientContext.Credentials = New SP.SharePointOnlineCredentials(username, securedPassword)
 
            Dim library = ClientContext.Web.Lists.GetByTitle("Esign")
            ClientContext.Load(library.RootFolder)
            ClientContext.ExecuteQuery()
        Catch
 
        End Try
    End Sub

Où est ce que j'ai péché? Quelqu'un pour m'aider, svp