Webhook Fails on Production URL: Cannot read properties of undefined (reading 'execute')

Questions
1

When I send any POST request to the Production URL of a webhook, the execution fails immediately with the error: Error: Cannot read properties of undefined (reading ‘execute’)

This happens even with a brand new workflow that contains only a single Webhook node and no other nodes connected. The “Test URL” works perfectly when listening for an event, but the Production URL always fails with this error.

Crucial Diagnostic Step:

To isolate the problem, I have tested the Production URL using an external tool (ReqBin and Postman). The error still occurs. This confirms the issue is on the n8n side and is not related to the original client (Forminator) sending the data.

My Environment:

  • n8n Version: 1.107.4
  • Database you’re using (e.g., SQLite, Postgres): postgresdb
  • n8n EXECUTIONS_PROCESS setting (if you know it): main
  • Running n8n via: railway
  • Operating System: Linux (on Railway)

Troubleshooting Steps Already Taken:

I have already tried the following without any success:

  • Deactivating and reactivating the workflow.
  • Deleting the webhook node and creating a new one (which generates a new URL).
  • Creating a completely new, blank workflow with just one webhook node.
  • Restarting my entire n8n instance (using docker-compose restart for my self-hosted setup).

Since the error happens even with a direct POST request from a clean source and persists after recreating the workflow, it feels like an issue with my n8n environment or installation.

Has anyone encountered this specific error at the trigger level before? Are there any deeper logs I can check or environment variables that might be causing this?

Thanks in advance for any suggestions!

2

Hi there, just making sure, you already setup your WEBHOOK_URL env value and it’s the same with what you see on the webhook url in the n8n display, correct?

3

Yes, I’ve already set the WEBHOOK_URL environment variable and it matches exactly with the webhook URL shown in the n8n UI. I’ve double-checked it, but the issue still persists. Could you help me identify what else might be causing this?

4

I’m having the same problem too.
Any feedback about it, pls?

5

hi, how diid you solve this.. im in version 1.113.3 and i have this problem.. even creating new workflows with new webhooks nodes

6

Guys, any response here?

I’ve been having this error for more than 3months now.
is there anything I can do in my railway n8n instance to configure it?

Error
Error: Cannot read properties of undefined (reading ‘execute’

7

On Railway I had the exact same problem. What fixed it was to redeploy both worker and the primary service so they get updated to latest. After that it all started working. WEBHOOK_URL not needed at all in my case.

Also note that while n8n error messages don’t tell us much, Railway has logs, they give us much better insight.