"Results must be an array" error for Trigger

Hi everyone, I’m a JS noob and I’m building out a trigger to list items from my API, but I’m getting the following error:

Invalid API Response:
  - Results must be an array, got: undefined, (undefined)
What happened (You are seeing this because you are an admin):
  Executing triggers.Blog_Posts_Listed.operation.perform with bundle
  Invalid API Response:
  - Results must be an array, got: undefined, (undefined)

Console logs:

Stack trace:
  CheckError: Invalid API Response:
    - Results must be an array, got: undefined, (undefined)
      at checkOutput (/var/task/node_modules/zapier-platform-core/src/app-middlewares/after/checks.js:42:15)
      at Object.<anonymous> (/var/task/node_modules/zapier-platform-core/src/middleware.js:80:37)
      at bound (domain.js:421:15)
      at Object.runBound (domain.js:432:12)
      at Object.tryCatcher (/var/task/node_modules/bluebird/js/release/util.js:16:23)
      at Promise._settlePromiseFromHandler (/var/task/node_modules/bluebird/js/release/promise.js:547:31)
      at Promise._settlePromise (/var/task/node_modules/bluebird/js/release/promise.js:604:18)
      at Promise._settlePromiseCtx (/var/task/node_modules/bluebird/js/release/promise.js:641:10)
      at _drainQueueStep (/var/task/node_modules/bluebird/js/release/async.js:97:12)
      at _drainQueue (/var/task/node_modules/bluebird/js/release/async.js:86:9)
      at Async._drainQueues (/var/task/node_modules/bluebird/js/release/async.js:102:5)
      at Immediate.Async.drainQueues [as _onImmediate] (/var/task/node_modules/bluebird/js/release/async.js:15:14)
      at processImmediate (internal/timers.js:464:21)
      at process.topLevelDomainCallback (domain.js:152:15)
      at process.callbackTrampoline (internal/async_hooks.js:128:24)

Here’s my code:

const options = {
  url: 'https://app.quickblog.co/api/v1/listposts',
  method: 'POST',
  headers: {
    'accept': 'application/json',
    'token': bundle.authData.token,
    'apikey': bundle.authData.apikey,
    'apisecretkey': bundle.authData.apisecretkey
  },
  params: {
    'page': bundle.meta.page
  },
  body: {
    'accountId': bundle.inputData.accountId
  }
}

return z.request(options)
  .then((response) => {
    response.throwForStatus();
    const results = response.json.data;
    results.forEach(function(result) {
      result.originalId = result.id;
    });
    return results.data;
  });

Support have already helped me loads and I can’t keep going back to them to help me fix my code! Any ideas how I can fix this? I believed the results.data statement already accounted for the array presentation but I can’t work out what I’m doing wrong here! Any help would be much appreciated!