Could not create SSL/TLS secure channel - Connecting Microsoft Flows with HTTP request

Question

I am a new user for Microsoft Flows.

I have a requirement for Connecting the Microsoft Flow with HTTP Request.

When connecting the HTTP Request, I am using the Client Certificate with the .pfx certificate file.

I am using the below format :

{ "type": "ClientCertificate", "pfx": "aGVsbG8g...d29ybGQ=", "password": "myPassword" }

I am adding the pfx file in Base64 Encoding Format and Password in Plain Text format.

While running the Flow, I get the below error :

BadRequest. Http request failed with status code 'SecureChannelFailure' 
and status message: 'The request was aborted: Could not create SSL/TLS secure 
channel.'.

Please help me to resolve this issue and correct the SSL/TLS Secure Channel Error.

Thanks, :)