404 Error POST to Webhook Listener - Self Hosted Cloud Config

Questions
1

im running a google cloud vm. I have n8n running in docker on that instance. i have a postgresql db instance running with persistient storage, connected to the vm instance. i deployed a front end on nginx using the a simple index.html file. n8n was deployed using the config below. I have a web listener configured in n8n using basic auth. When i submit an answer via the button on the UI i get a 404 error. I have checked all the POST request urls for accuracy, checked the firewalls on GC and local, and tried bypassing nginx and posting directly to n8n with curl. everything results in the same error (some version of):

Error 
Cannot POST /evaluation/question1

The n8n logs are clean as well. I am quite frustrated. help

n8n config:

docker run -d
–name n8n
-p 5678:5678
-v ~/.n8n:/home/node/.n8n
-e DB_TYPE=postgresdb
-e DB_POSTGRESDB_DATABASE=n8n
-e DB_POSTGRESDB_HOST=34.130.151.173
-e DB_POSTGRESDB_PORT=5432
-e DB_POSTGRESDB_USER=n8n-user
-e DB_POSTGRESDB_PASSWORD=‘xP4a_YFNdMmyj7svWn4’
-e N8N_BASIC_AUTH_ACTIVE=true
-e N8N_BASIC_AUTH_USER=dougjerum
-e N8N_BASIC_AUTH_PASSWORD=‘’
-e N8N_SECURE_COOKIE=false
-e N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS=true
-e N8N_HOST=34.130.188.162
-e WEBHOOK_URL=http://34.130.188.162
-e N8N_ENCRYPTION_KEY=
n8nio/n8n

Information on your n8n setup

  • n8n version: 1.76.2
  • Database: postgres16
  • n8n EXECUTIONS_PROCESS setting: Not sure, didnt change
  • Running n8n via Docker
  • Operating system: MacOS Sequoia
2

It looks like your topic is missing some important information. Could you provide the following if applicable.

  • n8n version:
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app):
  • Operating system:
3

I too am getting error 404. same workflow works in n8n cloud in production mode, but not locally running in docker.

version: "3.8"
# create new encryption key
#rm -rf ./n8n_data/config

# N8N_USER_MANAGEMENT_DISABLED=true: Disables user management, removing the account creation screen.
# N8N_BASIC_AUTH_ACTIVE=true: Enables basic authentication to secure the UI.
# N8N_BASIC_AUTH_USER and N8N_BASIC_AUTH_PASSWORD: Set the username and password for logging into the UI.
# N8N_DISABLE_PRODUCTION_MAIN_PROCESS=true: Disables the production checks.

######## To run n8n in Docker ########
# docker compose down
# docker compose up
# http://localhost:5678

services:
  n8n:
    image: n8nio/n8n
    container_name: n8n
    restart: always
    ports:
      - "5678:5678"
    environment:
      - N8N_BASIC_AUTH_ACTIVE=true
      - N8N_BASIC_AUTH_USER=admin
      - N8N_BASIC_AUTH_PASSWORD=admin
      - N8N_USER_MANAGEMENT_DISABLED=true
      - N8N_DIAGNOSTICS_ENABLED=false
      - N8N_ENCRYPTION_KEY=my_super_secret_key
      - N8N_DISABLE_PRODUCTION_MAIN_PROCESS=true
      - N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS=false
####### Production Ready settings allowing multiple calls to webhooks ###
      #- N8N_DEPLOYMENT_TYPE=main
      #- N8N_PROTOCOL=http  # or https
      #- N8N_PORT=5678
      - N8N_HOST=localhost  # Change from 127.0.0.1 to localhost
      - N8N_LISTEN_ADDRESS=0.0.0.0  # Add this line
      - N8N_WEBHOOK_URL=http://localhost:5678/  # Add this to explicitly set webhook base URL
      - N8N_WEBHOOK_TUNNEL=http://localhost:5678
      - N8N_WEBHOOK_URL=http://localhost:5678/

    volumes:
      - n8n_data:/home/node/.n8n
volumes:
  n8n_data: {}                      # Define the named volume here
4

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.