Webhook error "The requested webhook is not registered."


I’m facing a problem with the “respond to webhook node”

I’m trying to setup a POST webhook to send data from one app to another, using n8n.

The problem’s that when I save my workflow and try to send data to the webhook this error message appears

“code”:404,“message”:“The requested webhook "GET mywebhookcrashes" is not registered.”.

I must precise that I saved my workflow after renaming my webhook’s path and launching it so it can wait for a new trigger event.

I’d like to know why the error message’s talking about a “GET webhook” while i did register it as a “POST webhook”.

I tried passing the webhook in “GET” and sending test data. Then I have no more 404 error, but a 504 error.

Here’s the response when the webhook’s setup on POST

Here’s the response when the webhook’s setup on GET

The most stunning’s that it did work perfectly during past weeks

Thank you in advance, let me know whenever you need more details!

Hey @Anthony73370, can you share your webhook node and confirm which version of n8n you are currently running?

The 504 error could suggest that n8n isn’t sending a response, do you see anything relevant in your execution logs or the server logs?

  "nodes": [
      "parameters": {
        "httpMethod": "POST",
        "path": "7dfda04e-55a8-4f72-bbaf-dcea2376c5c5",
        "options": {}
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 1,
      "position": [
      "webhookId": "7dfda04e-55a8-4f72-bbaf-dcea2376c5c5"
  "connections": {}

Here's the node!

And I'm running the 0.175.1 version of n8n!

I can't see anything relevant in the logs...

So when running a workflow including this node I only get the The requested webhook \"GET 7dfda04e-55a8-4f72-bbaf-dcea2376c5c5\" is not registered if I am actually sending a GET request.

A post request is working fine:

Can you test sending your webhook from a tool you have full control over to make sure you’re sending a POST request? Like Postman, Insomnia or curl?