Webhooks Aren't Working

Questions
1

I tested acrosss two different workflows, webhook nodes are failing whenever I trigger them.

Screenshot 2025-11-29 at 6.17.48 PM
Screenshot 2025-11-29 at 6.17.48 PM2880×1594 496 KB

Screenshot 2025-11-29 at 6.13.24 PM
Screenshot 2025-11-29 at 6.13.24 PM2744×1518 353 KB

fastest way to find solutions is by using the :magnifying_glass_tilted_right: search function at the upper right.
If your question hasn’t been asked before, please follow the template below. Skip the questions that are not relevant to you. →

Describe the problem/error/question

What is the error message (if any)?

Please share your workflow

Share the output returned by the last node

Information on your n8n setup

  • n8n version: latest
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app):
  • Operating system: heroku
2

You should handle each method’s output separately, as treating them the same way can cause errors if the expected data structure differs between methods. For example, a POST request might include a body, while a GET request might not, leading to undefined properties if not handled properly and enable “Allow Multiple HTTP Methods” in the node settings.

3

That’s interesting. Do you see the issue with a workflow with just the trigger? My instance is not on Heroku, it’s on ec2 with a nginx in front. Works fine here:

image
image980×472 16.3 KB

I was able to test it by "listening” and hitting the url endpoint.

Do you see a “connection lost “on the top right corner of the canvas or any errors from the dev tool console of your browser?

Khem

4

I don’t see any other errors. Here are the heroku logs:

2025-11-30T08:54:13.007548+00:00 heroku[router]: at=info method=GET path=“/webhook-test/c2cf89b5-8c51-424f-bcdd-9968791ff273” host=n8n.scoutnow.app request_id=7c34f34d-3a54-440f-d5ba-d92befbffeff fwd=“182.185.152.80” dyno=web.1 connect=0ms service=4ms status=500 bytes=77 protocol=http2.0 tls=true tls_version=tls1.3
2025-11-30T08:54:13.005812+00:00 app[web.1]: Cannot read properties of undefined (reading ‘getNode’)
2025-11-30T08:54:13.006849+00:00 app[web.1]: Error in handling webhook request GET /webhook-test/c2cf89b5-8c51-424f-bcdd-9968791ff273: Workflow Webhook Error: Workflow could not be started!
2025-11-30T08:54:13.259807+00:00 app[web.1]: Cannot read properties of undefined (reading ‘getNode’)

I used the following test command on my terminal:

curl ``https://n8n.scoutnow.app/webhook-test/c2cf89b5-8c51-424f-bcdd-9968791ff273
{“code”:0,“message”:“Workflow Webhook Error: Workflow could not be started!”}%

5

Finally, the problem fixed after downgrading n8n version from latest 1.121.3 to 1.120.4.