Hi, I am facing the exact same issue. Were you able to resolve this? Thank you!

Hi, Sorry for another question here: But For me, I am not able to create a merchant session successfully. I am running the .NET framework 4.8. Also, while calling the validation URL with HTTP Client, I am setting the TLS to 1.2 explicitly. I am able to load the certificate properly, but when calling the URL, it gives an exception "An error occurred while sending the request. " Inner Exception: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host The underlying connection was closed: An unexpected error occurred on a send. Can you please help? Thank you.