Failed to automate PowerShell script using service principal for Power BI Security AD group

Hello All,

Daily I want to automate the Powershell script for extracting Power BI Security AD groups using service principal. Few days back we are able to automate the script but suddenly yesterday onwards i am getting the below error. 

PowerShell script I am using to extract Power BI security AD groups which are added to the Workspace as given below

$AppId = "AppID"
$TenantId = "TenantID"
$ClientSecret = "ClientSecret"

$MsalToken = Get-MsalToken -TenantId $TenantId -ClientId $AppId -ClientSecret ($ClientSecret | ConvertTo-SecureString -AsPlainText -Force)

#Connect to Graph using access token
Connect-graph -AccessToken $MsalToken.AccessToken

$Groups = Get-MgGroup -all|Where-Object {($_.DisplayName -like 'a-PBIxx-*')}|Select-Object Id,DisplayName
foreach ($Group in $Groups)
{
$Group_GUID = $Group.Id
$Group_DisplayName = $Group.DisplayName
$GroupMembers = get-mggroupmember -GroupId $Group_GUID -All

foreach ($GroupMember in $GroupMembers)
{
$users = get-mguser -userid $GroupMember.id
$Properties = @{"GroupDisplayName"=$Group_DisplayName;
"MemberDisplayName"=$users.DisplayName;
"MemberEmail"=$users.UserPrincipalName;
"GUID"=$Group_GUID;}

$Obj = New-Object -TypeName PSObject -Property $Properties
Write-Output $Obj | select GUID,GroupDisplayName,MemberDisplayName,MemberEmail |Export-Csv -Path File path/.csv
}
}
Get-Mggroup -all | Where-Object {($_.DisplayName -like 'a-PBIxx-*')} | ? {(Get-Mggroupmember -GroupId $_.Id).count -eq 0 } | Select-Object Id,DisplayName|Export-Csv -Path File path/.csv -NoTypeInformation
$csvData = Import-Csv -Path File path/.csv" | Select-Object @{n='GUID';e={$_.Id}},@{n='GroupDisplayName';e={$_.DisplayName}},MemberDisplayName,MemberEmail
$csvData | Export-Csv -Append -NoTypeInformation -Path "File path/.csv"

Thanks in advance!