Connect-PowerBI with Master account using .NET 6 throwing SSL connection could not be established.

I am trying to connect  PowerBI Online with Mater account using .NET 6.

Below is the code which am using

scopes = { "https://analysis.windows.net/powerbi/api/.default" };

Class libary:Microsoft.Identity.Client

Method Name:authenticationResult = clientApp.AcquireTokenByUsernamePassword(scopes, "userName", password).ExecuteAsync().GetAwaiter().GetResult();

getting the below errors.

The SSL connection could not be established, see inner exception.

ex.InnerException.StackTrace: at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable`1.ConfiguredValueTaskAwaiter.GetResult()
at System.Net.Security.SslStream.<<FillHandshakeBufferAsync>g__InternalFillHandshakeBufferAsync|187_0>d`1.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable`1.ConfiguredValueTaskAwaiter.GetResult()
at System.Net.Security.SslStream.<ReceiveBlobAsync>d__174`1.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Threading.Tasks.ValueTask`1.get_Result()
at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable`1.ConfiguredValueTaskAwaiter.GetResult()
at System.Net.Security.SslStream.<ForceAuthenticationAsync>d__173`1.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
at System.Net.Http.ConnectHelper.<EstablishSslConnectionAsync>d__2.MoveNext()

Note: .net framework 4.8,it's working fine.

Any assistance is appreciated.