Downloading files in sharepoint online Powershell

i am receiving the error message below when trying to download documents from SharePoint online. i am able to connect and retrieve the properties of the items in the document library. But when i then try to download the files i get a 403 forbidden error.

anybody able to point me in the right direction or spot what i could be doing wrong

Code

[Reflection.Assembly]::LoadFile("C:\Program Files\Common Files\microsoft shared\Web Server Extensions\16\ISAPI\ClaimsAuth.dll")
Add-Type –Path "C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type –Path "C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
$spUrl = "https://mysharepointsite/sites/COP/SharePoint/Buko"
$listTitle = "Documents"
$outPath = "C:\Users\BUKO\Downloads\CRAP\Powershell downloads"

$spoContext = New-Object SPOContext("$spUrl")

$web = $spoContext.Web;
                $List = $web.Lists.GetByTitle($listTitle)
                #$list = $spoContext.Web.Lists.GetByTitle($listTitle)
                $qry = [Microsoft.SharePoint.Client.CamlQuery]::CreateAllItemsQuery()
                $items = $list.GetItems($qry)
                $spoContext.Load($list)
                $spoContext.Load($items)
                $spoContext.ExecuteQuery()

                $siteUri = [Uri]$spUrl
                $client = new-object System.Net.WebClient
                $client.UseDefaultCredentials=$true
                $client
                $siteUri

                if ( -not (Test-Path $outPath) ) {
                    New-Item $outPath -Type Directory  | Out-Null
                }

                $items | % {

                        $url = new-object Uri($siteUri, $_["FileRef"])
                        $fileName = $_["FileLeafRef"]
                        $outFile = Join-Path $outPath $fileName
                        Write-Host "Downloading $url to $outFile"

                        $client.DownloadFile( $url, $outFile )
                
                
                
                }

ERROR MESSAGE

Exception calling "DownloadFile" with "2" argument(s): "The remote server 
returned an error: (403) Forbidden."
At C:\Users\BUKO\Documents\Powershell Projects Scripts\tests2.ps1:36 char:25+                         $client.DownloadFile( $url, $outFile )+                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException+ FullyQualifiedErrorId : WebException