Cannot read properties of undefined (reading 'body')

[raul]

I'm trying to set up a sentinel that has a check with autotask condition checks.

Environment

Defender - Sentinel and Autotasks

Details

I'm following @spalladino answer on another post as a guide.

Get Balance of address and check < 5000 tokens?

Exactly! You can also use Autotask Condition checks for this. What you want to do is more or less the following: Create a new Sentinel on Rinkeby that watches over the token contract address (not the address whose balance you want to check) As @Skyge says, choose the Transfer event as a condition, and narrow it down by from == YOUR_ADDRESS so you only look for transfers of funds out of your address. Set up an Autotask as Condition check that will be invoked by this Sentinel on every transfer …

I think I've followed everything, but I'm getting the following error when running the autotask:

Error
Cannot read properties of undefined (reading 'body')

{"errorType":"TypeError","errorMessage":"Cannot read properties of undefined (reading 'body')","stack":["TypeError: Cannot read properties of undefined (reading 'body')","    at exports.handler (/var/task/index.js:2:44)","    at Runtime.handler (/opt/nodejs/autotask-wrapper.js:83:26)","    at Runtime.handleOnceNonStreaming (file:///var/runtime/index.mjs:1086:29)"]}

Code to reproduce

I basically want to check if the tokens of the specific wallet are under 1000. The sentinel is currently set up as having a condition where the "from" is the wallet address where the tokens are stored: (address is there)

exports.handler = async function (payload) {
  const conditionRequest = payload.request.body;
  const matches = [];
  const events = conditionRequest.events;
  const ethers = require('ethers');
  const IERC20 = require('@openzeppelin/contracts/build/contracts/IERC20.json');

  for (const evt of events) {
    const token = new ethers.Contract("contractAddress", IERC20.abi, ethers.getDefaultProvider());
    const balanceDistrPool = await token.balanceOf("walletAddress");
    let result = false;
    if(balanceDistrPool < 1000 * 10**18){
      result = true;
    }
    
    // metadata can be any JSON-marshalable object (or undefined)
    matches.push({
      hash: evt.hash,
      metadata: {
        lowBalance: result
      },
    });
  }
  return { matches };
};

Am I doing this right?
Thanks