TimeEpoch error when API Gateway Testing

Hello,
I’m new using Serverless and first time sharing a question. I have to say is awesome!
I’m performing a POST request using API Gateway + Lambda. When I test it on Lambda via console there’s no problem, but when testing in API Gateway there’s a strange error:

{
  "errorType": "TypeError",
  "errorMessage": "Cannot read property 'requestTimeEpoch' of undefined",
  "trace": [
    "TypeError: Cannot read property 'requestTimeEpoch' of undefined",
    "    at Runtime.handler (/var/task/serverless_sdk/index.js:9:86135)",
    "    at Runtime.handleOnce (/var/runtime/Runtime.js:66:25)",
    "    at process._tickCallback (internal/process/next_tick.js:68:7)"
  ]
}

And in final lines of the log:

Fri Sep 06 14:32:43 UTC 2019 : Endpoint response body before transformations: {"errorType":"TypeError","errorMessage":"Cannot read property 'requestTimeEpoch' of undefined","trace":["TypeError: Cannot read property 'requestTimeEpoch' of undefined","    at Runtime.handler (/var/task/serverless_sdk/index.js:9:86135)","    at Runtime.handleOnce (/var/runtime/Runtime.js:66:25)","    at process._tickCallback (internal/process/next_tick.js:68:7)"]}
Fri Sep 06 14:32:43 UTC 2019 : Method response body after transformations: {"errorType":"TypeError","errorMessage":"Cannot read property 'requestTimeEpoch' of undefined","trace":["TypeError: Cannot read property 'requestTimeEpoch' of undefined","    at Runtime.handler (/var/task/serverless_sdk/index.js:9:86135)","    at Runtime.handleOnce (/var/runtime/Runtime.js:66:25)","    at process._tickCallback (internal/process/next_tick.js:68:7)"]}
Fri Sep 06 14:32:43 UTC 2019 : Method response headers: {X-Amzn-Trace-Id=Root=1-5d726e0b-dcef5e8d6fab2e410341b7ca;Sampled=0, Access-Control-Allow-Origin=*, Content-Type=application/json}
Fri Sep 06 14:32:43 UTC 2019 : Successfully completed execution
Fri Sep 06 14:32:43 UTC 2019 : Method completed with status: 200

Please, can you share some ideas about how to solve it?. Below is the service:

service: eureky-imageProcessor
app: eureky
org: ecalle17

# You can pin your service to only deploy with a specific Serverless version
# Check out our docs for more details
# frameworkVersion: "=X.X.X"

provider:
  name: aws
  runtime: nodejs10.x
  stage: ${opt:stage, 'dev'}
  region: us-west-2
  environment:
    REGION: ${self:provider.region}

functions:
  imageProcessor:
    handler: handler.imageProcessor
    events:
      - http:
          description: Process image and returns a package with converted resources
          path: imgProcessor
          method: post
          cors: true

and the lambda function:
‘use strict’;

module.exports.imageProcessor = function (event, context, callback) {
  console.log(event)

  if (event.httpMethod === 'POST' && event.body) {
    const response = {
      statusCode: 200,
      headers: {
        "Content-Type": "application/json",
        "Access-Control-Allow-Origin": "*", // Required for CORS support to work
        "Access-Control-Allow-Credentials": true // Required for cookies, authorization headers with HTTPS 
      },
      body: JSON.stringify({
          message: 'Go Serverless v1.0! Your function executed successfully!',
        })
    };

    callback(null, response)
  }
};

Thank you!