Sharepoint client object model “File not found” Powershell

Hello, I have some issue when i try to create a folder or a file with CSOM and PowerShell.

This is a sample of my code to create a folder :

$web_sp = $session_sp.Web
$session_sp.Load($web_sp)
$session_sp.ExecuteQuery()
$folder = $web_sp.GetFolderByServerRelativeUrl(($urlGed.Valeur+'/'+$ObjGed.Valeur+'/Commandes'))
$session_sp.Load($folder)
$session_sp.ExecuteQuery()
# at this moment if I check $folder.ServerRelativeUrl it returns the good url so I thinks it means it's loaded correctly
$myNewFolder = $folder.Folders.Add('NewFolder') # Here no exeption
$session_sp.Load($myNewFolder) #Folder or Folder.Folders
$session_sp.ExecuteQuery()

at the last ExecuteQueryan an exception has occurred ("File not found")
(When I use the Sharepoint web page I can create folder and file so I think I have the acces rigth

Hi,

Please try below code.

$SiteUrl = "https://contoso.sharepoint.com/sites/marketing"
$ListURL="/sites/marketing/Shared Documents"
$FolderName="Reports"
$UserName="[email protected]"
$Password ="password goes here"
#Setup Credentials to connect
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName,(ConvertTo-SecureString $Password -AsPlainText -Force))
Try {
#Set up the context
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl)
$Context.Credentials = $credentials
#Get the List Root Folder
$ParentFolder=$Context.web.GetFolderByServerRelativeUrl($ListURL)
#Create New Folder
$Folder = $ParentFolder.Folders.Add($FolderName)
$ParentFolder.Context.ExecuteQuery()
Write-host "New Folder Created Successfully!" -ForegroundColor Green
}
catch {
write-host "Error: $($_.Exception.Message)" -foregroundcolor Red
}