Error connexion : Connecting to FTP error

# Specify directories
$localPath = "C:\Temp\script"
$remotePath =  "/test"
 
    # Load WinSCP .NET assembly
Add-Type -Path "C:\Program Files (x86)\WinSCP\WinSCPnet.dll"
 
 
try
{
 
    # Setup session options
    $sessionOptions = New-Object WinSCP.SessionOptions -Property @{
        Protocol = [WinSCP.Protocol]::ftp
        HostName = "eportal-scheduled.services.xxxx.com"
        UserName = "eportal-ftp@anonyme.fr"
        Password = "xxxxxxxx*B"
    }
 
    $session = New-Object WinSCP.Session
 
    try
    {
        # Connect
        Write-Host "Connecting to FTP..."
        $session.Open($sessionOptions)
 
        # Download files
        $transferOptions = New-Object WinSCP.TransferOptions
        $transferOptions.TransferMode = [WinSCP.TransferMode]::Binary
         
        Write-Host "Synchronizing changes..."
        $transferResult =
            $session.SynchronizeDirectories(
                  [WinSCP.SynchronizationMode]::Local, $localPath, $remotePath, $false. $transferOptions)
 
        # Throw on any error
        $transferResult.Check()
 
        # Print results
        foreach ($transfer in $transferResult.Downloads)
        {
            Write-Host "Download of $($transfer.FileName) succeeded"
        }
    }
    finally
    {
        # Disconnect, clean up
        $session.Dispose()
    }
 
    exit 0
}
catch
{
    Write-Host "Error: $($_.Exception.Message)"
    exit 1
}

Connecting to FTP...
Error: Exception calling "Open" with "1" argument(s): "Connection failed.
Connection failed.
Sorry, cleartext sessions are not accepted on this server.
Please reconnect using SSL/TLS security mechanisms."

    $sessionOptions = New-Object WinSCP.SessionOptions -Property @{
        Protocol = [WinSCP.Protocol]::ftp
        HostName = "eportal-scheduled.services.xxxx.com"
        UserName = "eportal-ftp@anonyme.fr"
        Password = "xxxxxxxx*B"
        FtpSecure = [WinSCP.FtpSecure]::Explicit
    }