clone tiles errors

Hi,

I have a script that clones reports, dashboards and tiles into a different workspace.

Reports and dashboards are cloned correctly.

When cloning tiles, I get the following error:

System.Net.WebException: The remote server returned an error: (401) Unauthorized.
at Microsoft.PowerShell.Commands.WebRequestPSCmdlet.GetResponse(WebRequest request)
at Microsoft.PowerShell.Commands.WebRequestPSCmdlet.ProcessRecord()

function GetAuthToken
{
$adal = "${env:ProgramFiles}\WindowsPowerShell\Modules\AzureRM.profile\4.5.0\Microsoft.IdentityModel.Clients.ActiveDirectory.dll"

$adalforms = "${env:ProgramFiles}\WindowsPowerShell\Modules\AzureRM.profile\4.5.0\Microsoft.IdentityModel.Clients.ActiveDirectory.WindowsForms.dll"

[System.Reflection.Assembly]::LoadFrom($adal) | Out-Null

[System.Reflection.Assembly]::LoadFrom($adalforms) | Out-Null

$redirectUri = "urn:ietf:wg:oauth:2.0:oob"

$resourceAppIdURI = "https://analysis.windows.net/powerbi/api"

$authority = "https://login.microsoftonline.com/common/oauth2/authorize";

$authContext = New-Object "Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext" -ArgumentList $authority

$authResult = $authContext.AcquireToken($resourceAppIdURI, $clientId, $redirectUri, "Auto")

return $authResult
}

# PART 1: Authentication
# ==================================================================
$token = GetAuthToken

# Building Rest API header with authorization token
$auth_header = @{
'Content-Type'='application/json'
'Authorization'=$token.CreateAuthorizationHeader()
}

Please help!!!