Certificate authentication to Azure stopped work

Hi guys I found out that all my scripts that use Azure App Registration and Certificate to authenticate stopped work.
I have a App registered in Entra ID with required permissions, certificate is valid. I also have administrator rights on server and global admin in Azure. .NET version is 4.7, OS level Windows Server 2022, Powershell version 5.1 The strangest thing is that when I run the script using the task scheduler it works, the script proves to be authenticated and do the job(Task run with same account like i´m connected to server)

It used to work few weeks ago. But now I´m getting following error message + adding one code example
Error

Get-msaltoken : Could not use the certificate for signing. See inner exception for details. Possible cause: this may be a known issue with apps build against .NET Desktop 4.6 or lower. Either target a higher version of .NET desktop - 4.6.1 and above, or use a different 
certificate type (non-CNG) or sign your own assertion as described at https://aka.ms/msal-net-signed-assertion. 
At xxxxxxxxx - Sending email\Send email with oAuth2.ps1:17 char:14
+ $msalToken = Get-msaltoken @appRegistration -ForceRefresh
+              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : AuthenticationError: (Microsoft.Ident...arameterBuilder:AcquireTokenForClientParameterBuilder) [Write-Error], MsalClientException
    + FullyQualifiedErrorId : GetMsalTokenFailureAuthenticationError,Get-MsalToken

Code

Import-module MSAL.PS
# acquire an access token to interact with the app
# we use a certificate from the users personal store
$appRegistration = @{
    TenantId          = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    ClientId          = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    ClientCertificate = Get-item "Cert:\xxxx\xxx\xxxxxxxxx"
}

$msalToken = Get-msaltoken @appRegistration -ForceRefresh


# request body which contains our message
$requestBody = @{
    "message"         = [PSCustomObject]@{
        "subject"      = "OAuth Mail Sent from PowerShell via App"
        "body"         = [PSCustomObject]@{
            "contentType" = "Text"
            "content"     = "Hello this is a test `n`n Cheers, `n Petr G"
        }
        "toRecipients" = @(
            [PSCustomObject]@{
                "emailAddress" = [PSCustomObject]@{
                    "address" = "xxxxxxxxx@xxx.xx"
                }
            }
        )
        
    }
    "saveToSentItems" = "true"
}

# make the graph request
$request = @{
    "Headers"     = @{Authorization = $msalToken.CreateAuthorizationHeader() }
    "Method"      = "Post"
    "Uri"         = "https://graph.microsoft.com/v1.0/users/xxxxxxx@xxxxx.xxxx/sendMail"
    "Body"        = $requestBody | ConvertTo-Json -Depth 5
    "ContentType" = "application/json"
}

Invoke-RestMethod @request

Does any of you have idea what´s going on? Thanks in advance