Error during signUp: Error: 13 INTERNAL: Received RST_STREAM with code 2 triggered by internal client error: Protocol error

I am getting following error when i try to make grpc call using my node client:

code: 13,
  details: 'Received RST_STREAM with code 2 triggered by internal client error: Protocol error',
  metadata: Metadata { internalRepr: Map(0) {}, options: {} }

Following is how am trying to make the call: SingUpRequest and CustomerServiceExternalClient is imported from my protos

 grpcClient: CustomerServiceExternalClient
 constructor(){
this.grpcClient = new CustomerServiceExternalClient(
       'mygrpcserveraddress', 
      ChannelCredentials.createInsecure() 
    )
}

async myfunction() {
const signUpRequest: SignUpRequest = {
      signInAttributeKey: 'somekey',
      signInAttributeValue: '3333333333339', 
      requestMetadata: {}, 
    }

    try {
      const signUpResponse = await new Promise((resolve, reject) => {
        this.grpcClient.signUp(signUpRequest, (error, response) => {
          if (error) {
            reject(error)
          } else {
            resolve(response)
          }
        })
      })

      console.log('SignUp successful:', signUpResponse)
    } catch (error) {
      console.error('Error during signUp:', error)
      throw error 
    }

}

I tried calling grpc function SignUp but it gave me following error:

  code: 13,
  details: 'Received RST_STREAM with code 2 triggered by internal client error: Protocol error',
  metadata: Metadata { internalRepr: Map(0) {}, options: {} }

Note: I have tested the same grpc call using postman using same server address and port and it is working. This error only occur when running my client.

The issue was with SSL certificate.. while creating client i was using createInsecure() instead of createSSL function. [ChannelCredentials.createSsl()]