Got blank page when access to dashboard

lqdominguez · May 7, 2024, 11:06pm

Describe the problem/error/question

I was using my n8n instance without any issues, but suddenly I started getting a blank page when accessing it.

Initially, I could still access it using another browser session, but now I can’t access it from any computer I’ve tried.

What is the error message (if any)?

These are the logs in the console:

Information on your n8n setup

**n8n version:1.36.4
**Database (default: SQLite):PostgreSQL
**n8n EXECUTIONS_PROCESS setting (default: own, main):default
**Running n8n via (Docker, npm, n8n cloud, desktop app):Docker
**Operating system:Ubuntu

barn4k · May 8, 2024, 7:51am

Hello @lqdominguez

Can you provide the docker configuration?

lqdominguez · May 10, 2024, 8:15pm

Hi @barn4k, this is my config

version: "3"

services:
  traefik:
    image: "traefik"
    restart: always
    command:
      - "--api=true"
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--entrypoints.web.address=:80"
      - "--entrypoints.web.http.redirections.entryPoint.to=websecure"
      - "--entrypoints.web.http.redirections.entrypoint.scheme=https"
      - "--entrypoints.websecure.address=:443"
      - "--certificatesresolvers.mytlschallenge.acme.tlschallenge=true"
      - "--certificatesresolvers.mytlschallenge.acme.email=${SSL_EMAIL}"
      - "--certificatesresolvers.mytlschallenge.acme.storage=/letsencrypt/acme.json"
    ports:
      - "80:80"
      - "443:443"
    volumes:
      # - ${DATA_FOLDER}/letsencrypt:/letsencrypt
      - traefik_data:/letsencrypt
      - /var/run/docker.sock:/var/run/docker.sock:ro

  n8n:
    image: n8nio/n8n
    # build: ./customn8n
    restart: always
    ports:
      - "127.0.0.1:5678:5678"
    labels:
      - traefik.enable=true
      - traefik.http.routers.n8n.rule=Host(`${SUBDOMAIN}.${DOMAIN_NAME}`)
      - traefik.http.routers.n8n.tls=true
      - traefik.http.routers.n8n.entrypoints=web,websecure
      - traefik.http.routers.n8n.tls.certresolver=mytlschallenge
      - traefik.http.middlewares.n8n.headers.SSLRedirect=true
      - traefik.http.middlewares.n8n.headers.STSSeconds=315360000
      - traefik.http.middlewares.n8n.headers.browserXSSFilter=true
      - traefik.http.middlewares.n8n.headers.contentTypeNosniff=true
      - traefik.http.middlewares.n8n.headers.forceSTSHeader=true
      - traefik.http.middlewares.n8n.headers.SSLHost=${DOMAIN_NAME}
      - traefik.http.middlewares.n8n.headers.STSIncludeSubdomains=true
      - traefik.http.middlewares.n8n.headers.STSPreload=true
    environment:
      - N8N_BASIC_AUTH_ACTIVE=true
      # - N8N_BASIC_AUTH_USER
      # - N8N_BASIC_AUTH_PASSWORD
      - N8N_USER_MANAGEMENT_DISABLED=true
      - N8N_HOST=${SUBDOMAIN}.${DOMAIN_NAME}
      - N8N_PORT=5678
      - N8N_PROTOCOL=https
      - NODE_ENV=production
      - NODE_OPTIONS="--max-old-space-size=262144" # set node memory limit
      - WEBHOOK_TUNNEL_URL=https://${SUBDOMAIN}.${DOMAIN_NAME}/
      - GENERIC_TIMEZONE=${GENERIC_TIMEZONE}
      - EXECUTIONS_DATA_PRUNE=true
      - EXECUTIONS_DATA_MAX_AGE=168
      - EXECUTIONS_DATA_PRUNE_MAX_COUNT=10000
      - DB_TYPE=postgresdb
      - DB_POSTGRESDB_HOST=${POSTGRES_HOST}
      - DB_POSTGRESDB_PORT=${POSTGRES_PORT}
      - DB_POSTGRESDB_DATABASE=${POSTGRES_DB}
      - DB_POSTGRESDB_USER=${POSTGRES_USER}
      - DB_POSTGRESDB_PASSWORD=${POSTGRES_PASSWORD}
      - DB_POSTGRESDB_SSL_REJECT_UNAUTHORIZED=false
    volumes:
      # - ${DATA_FOLDER}/.n8n:/home/node/.n8n
      - n8n_data:/home/node/.n8n
      - /local-files:/files

  express:
    build: ./expressjs
    restart: "always"
    ports:
      - "3000:3000"

volumes:
  traefik_data:
    external: true
  n8n_data:
    external: true

barn4k · May 10, 2024, 9:35pm

You have set the n8n to use HTTPS, but you didn’t specify a certificate to use with it. So in your case better to use HTTP for n8n and HTTPS for traffic.

lqdominguez · May 11, 2024, 2:51am

@barn4k I have another instance with the same config and everything is working ok.

I need to use HTTPS. How can I modify my docker config to set up HTTPS properly?

barn4k · May 11, 2024, 7:04am

You already have an HTTPS with traefic, but if you want to set up HTTPS between traefic and n8n, then you need to add ENVs: N8N_SSL_KEY and N8N_SSL_CERT to point to the local n8n’s key and certificate accordingly

lqdominguez · May 11, 2024, 11:17am

Ok, thanks, I will set up tha variables.

lqdominguez · May 11, 2024, 11:27am

The problem was solved. I made the following modifications to my docker compose file.

Added the following line to the labels section

 - traefik.http.routers.n8n.middlewares=n8n@docker

Removed the following from the enviroment section

- N8N_USER_MANAGEMENT_DISABLED=true

And also I replaced

- WEBHOOK_TUNNEL_URL=https://${SUBDOMAIN}.${DOMAIN_NAME}/

with this

- WEBHOOK_URL=https://${SUBDOMAIN}.${DOMAIN_NAME}/

system · May 18, 2024, 11:27am

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