Cloudflare 524 – WhatsApp webhook not responding / Meta verification fails

Help me Build my Workflow
1

Hi Guys :waving_hand:

I’m having a persistent problem where Meta (WhatsApp Cloud API) cannot verify my webhook because the endpoint never responds — it hangs for about a minute and then fails with a Cloudflare 524 timeout.

Here are my details:

What’s happening:

  • When the workflow is active, the webhook request hangs for ~60 seconds and then fails with:
    Error 524: A timeout occurred (The origin web server timed out responding to this request)
  • When the workflow is inactive, the URL loads instantly.
  • Meta (Facebook Developers dashboard) shows:
    “The callback URL or verify token couldn’t be validated. Please verify the provided information or try again later.”

What I’ve already tried:

  • Restarted the environment from the dashboard

  • Toggled workflow Active/Inactive multiple times

  • Tested both the test and production webhook URLs

  • Simplified workflow to only respond immediately with:
    {{$json[“query”][“hub.challenge”]}}
    (with response code 200 and header Content-Type: text/plain)

  • Confirmed that the workflow works locally when self-hosted with ngrok

Despite this, the Meta verification always fails, and the 524 timeout persists — even though deactivating the workflow makes the URL instantly reachable.

It looks like the n8n Cloud environment container might be stuck or not returning the immediate response to Meta.

Could you please restart or rebuild my environment container?

Thanks a lot for your help :folded_hands:
Jon Gjuraj