I have a self-hosted n8n and i asked chat gpt and tried many other options but it is not getting resolved

[Jitendra_Kavire]

I have a self-hosted n8n and when I open the n8n, I get a “connection lost” error. I tried to solve it with multiple solutions but it is not getting resolved. I also added N8N_PUSH_BACKEND=ssel, asked chat gpt and tried many other options but it is not getting resolved.
Troubleshooting Steps Taken for Connection Lost Error in n8n (Self-Hosted)
Environment:
VPS: Hostinger (Ubuntu 24.04 KVM)

n8n: Docker container (latest tag - v1.99.1)

Reverse Proxy: Nginx

Domain: https://n8n.revisionwave.com

SSL: Handled via Nginx (Let’s Encrypt / manually configured)
Installed and configured Docker & Nginx on a clean VPS.
Pulled latest n8nio/n8n image using:
Created and ran Docker container with necessary environment variables:
Configured Nginx reverse proxy (ports 80/443) with WebSocket support:
Updated and restarted Docker container multiple times after modifying environment variables.
Tested both sse and websocket push backends:
Error remained in both cases.
Checked logs using docker logs -f n8n, which showed repeated error but that also solved
Browser troubleshooting done:
Attempted to fix ‘origin’ issue by setting all URL-related env vars, including:
N8N_EDITOR_BASE_URL
VUE_APP_URL_BASE_API
WEBHOOK_TUNNEL_URL
Observed deprecation warning in logs:

please help me to solve this issue.

[mrrobot]

@Jitendra_Kavire

Are you getting any ssl certificate error in the logs?

[Jitendra_Kavire]

No, I have successfully added the SSLC certificate, i tried every where to solve this “connection lost” error, i am requesting you guys please connect me and help me to solve this problem. requesting you guys please please help.

[Wouter_Nigrini]

I use the following setup. I have a docker-compose to run auto nginx and ssl for my containers.

base/docker-compose.yml

services:
  nginx-proxy:
    image: jwilder/nginx-proxy:latest
    container_name: nginx
    restart: always
    ports:
      - 80:80
      - 443:443
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
      - /var/containers/volumes/nginx/certs:/etc/nginx/certs
      - /var/containers/volumes/nginx/vhost.d:/etc/nginx/vhost.d
      - /var/containers/volumes/nginx/html:/usr/share/nginx/html
    environment:
      - DHPARAM_GENERATION=false
    networks:
      - nginx

  nginx-proxy-ssh:
    image: jrcs/letsencrypt-nginx-proxy-companion:latest
    container_name: nginx-ssl
    restart: always
    volumes_from:
      - nginx-proxy
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
    environment:
      - DEFAULT_EMAIL=<YOUR EMAIL ADDRESS HERE>
    networks:
      - nginx

networks:
  nginx:

Example of my n8n setup joined to the base-nginx network so that nginx and auto ssl can do its job

services:
  n8n-db:
    image: postgres:16.1
    container_name: n8n-db
    restart: always
    environment:
      - POSTGRES_DB=n8n
      - POSTGRES_PASSWORD=n8n
      - POSTGRES_USER=n8n
      # - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - /var/containers/volumes/n8n/postgres-data:/var/lib/postgresql/data

  n8n:
    image: docker.n8n.io/n8nio/n8n:latest
    container_name: n8n
    restart: always
    depends_on:
      - n8n-db
    volumes:
      - /var/containers/volumes/n8n/app-data:/home/node/.n8n
    environment:
      - LETSENCRYPT_HOST=n8n.revisionwave.com
      - VIRTUAL_HOST=n8n.revisionwave.com
      - VIRTUAL_PORT=5678
      - WEBHOOK_URL=https://n8n.revisionwave.com
      - DB_TYPE=postgresdb
      - DB_POSTGRESDB_DATABASE=n8n
      - DB_POSTGRESDB_HOST=n8n-db
      - DB_POSTGRESDB_PORT=5432
      - DB_POSTGRESDB_USER=n8n
      - DB_POSTGRESDB_SCHEMA=n8n
      - DB_POSTGRESDB_PASSWORD=n8n
      - N8N_RUNNERS_ENABLED=true
      - N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS=true

networks:
  default:
    name: base_nginx
    external: true

Take note of joining the network for the base nginx containers as well as setting the dns in these env vars

      - LETSENCRYPT_HOST=n8n.revisionwave.com
      - VIRTUAL_HOST=n8n.revisionwave.com
      - VIRTUAL_PORT=5678