Load pubkey "C:/Users/circleci/.ssh/id_rsa": invalid format - message in circleci/windows@2.4.0 orbs

Build Environment
1

Hello team,
We are trying to automate web application using circleci/windows@2.4.0 orbs. After the checkout step we are getting a message as “load pubkey “C:/Users/circleci/.ssh/id_rsa”: invalid format”. We are using the win/default executor for this. This is the snippet from config.yml file.

   version: 2.1
    orbs:
      win: circleci/windows@2.4.0
    jobs:
      build:
        working_directory: ~/app
        executor: win/default
    steps:
      - checkout

Is there a way to resolve this error?