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n8n - 💡(How to fix) Fix whatsapp trigger not working

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Error Message

Describe the problem/error/question

I also tried configuring the webhook in Meta Developers under Webhooks → WhatsApp Business Account, but Meta shows a validation error for the callback URL / verify token.

What is the error message (if any)?

Error code shown:

  • The Meta Developers webhook validation error
  • error: all

Root Cause

The WhatsApp Trigger node does not return any output because it does not receive the incoming WhatsApp message.

RAW_BUFFERClick to expand / collapse

Describe the problem/error/question

I am trying to build a WhatsApp AI chatbot workflow in n8n using the WhatsApp Trigger node.

The workflow is:

WhatsApp Trigger → AI Agent → WhatsApp Send Message

I am able to send WhatsApp messages successfully using the WhatsApp Send Message node, so my WhatsApp credentials/API connection seem to work for outbound messages.

However, the WhatsApp Trigger is not receiving incoming messages. The trigger keeps waiting, but nothing is captured when I send a WhatsApp message to the connected business number.

I also tried configuring the webhook in Meta Developers under Webhooks → WhatsApp Business Account, but Meta shows a validation error for the callback URL / verify token.

What is the error message (if any)?

In Meta Developers, when I try to verify and save the webhook, I get:

“The callback URL or verify token couldn’t be validated. Please verify the provided information or try again later.”

Error code shown: #N/A:WBxP--1059329540-2961792696

Please share your workflow/screenshots/recording

Workflow setup: WhatsApp Trigger → AI Agent → WhatsApp Send Message

I have attached screenshots showing:

  • The n8n workflow
  • The WhatsApp Trigger setup
  • The Meta Developers webhook validation error
  • The webhook callback URL and verify token page

Sensitive data such as API keys/tokens have been removed.

Share the output returned by the last node

The WhatsApp Send Message node works and is able to send outbound messages.

The WhatsApp Trigger node does not return any output because it does not receive the incoming WhatsApp message.

Debug info

core

  • n8nVersion: 2.20.7
  • platform: docker (cloud)
  • nodeJsVersion: 24.14.1
  • nodeEnv: production
  • database: sqlite
  • executionMode: regular
  • concurrency: 5
  • license: enterprise (sandbox)

storage

  • success: all
  • error: all
  • progress: false
  • manual: true
  • binaryMode: filesystem

pruning

  • enabled: true
  • maxAge: 168 hours
  • maxCount: 2500 executions

client

  • userAgent: mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/148.0.0.0 safari/537.36 edg/148.0.0.0
  • isTouchDevice: false

Generated at: 2026-05-22T01:50:09.397Z

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n8n - 💡(How to fix) Fix whatsapp trigger not working