works locally, but on Lambda getting "params.Body is required" error

[mkantautas]

Nodejs 12.x

Using this lamda function to convert from heic to jpg and store to my s3 bucket.
works locally, but on Lambda getting "params.Body is required" error

"use strict";
const gm = require('gm').subClass({imageMagick: true});

const root = process.env['LAMBDA_TASK_ROOT'];
const path = process.env['PATH'];
const libPath = process.env['PATH'];
var AWS = require('aws-sdk');
var s3 = new AWS.S3();
// change the Lambda Runtime to use pre-built binary
process.env['PATH'] = `${root}/bin:${path}`;
process.env['LD_LIBRARY_PATH'] = `${root}/lib:${libPath}`;

// convert HEIC to JPEG
module.exports.handler = async (event, context, callback) => {
    let from = event.source_img_path;
    let to = event.destination_img_path
    let thumbnail = event.thumbnail
    // main
    let image = gm(from)
        .noProfile()

    if (thumbnail) {
        image = image.resize("128^", "128^")
            .crop(128, 128)
    }

    image.toBuffer('jpg', function (err, buffer) {
        let params = {Bucket: process.env.BUCKET_NAME, Key: to, Body: buffer};
        new Promise(resolve => {
            s3.upload(params, function (err, result) {
                if (err) {
                    console.log(err)
                    throw new Error('Could not upload photo');
                } else {
                    console.log(result)
                    resolve(result);
                }
            })
        })
    })
};

Does anyone know how to resolve this? Or the issue is that you can't use 'toBuffer' on Lambda? Thanks in advance.

[1001Josias]

Add an imagemagick layer in lambda?