Self-hosting errors, reproduced and fixed.

Every page starts from an error we reproduced on a real test machine. You get the exact error text, the commands we ran, their output, the one change that fixed it, and the versions we tested.

Reproduced, not rewritten. No error goes up unless we triggered it ourselves.
Versions on every page. Image tags and tool versions in a box at the top.
Dated. Each fix shows when it was last verified.

Latest fixes

dial tcp [::1]:80: connect: connection refused

Cloudflare Tunnel: 502 from a localhost Ingress, and a Redirect Loop That Switching SSL Mode Did Not Fix

A 502 came from the tunnel ingress pointing at http://localhost:80, which inside Docker is the cloudflared container itself; using the Compose service name (http://nginx:80) fixed …

Verified Oct 29, 2026Cloudflare Tunnelcloudflarednginxdockerredirects

Cannot POST /n8n/webhook/repro-hook

n8n Webhook Returns 404 Behind nginx (Sub-Path Proxy): The Trailing Slash in proxy_pass

With n8n published under the nginx sub-path /n8n/, an active webhook returned 404 Not Found (Cannot POST /n8n/webhook/repro-hook) through the proxy but 200 when called directly. Th…

Verified Oct 29, 2026n8nnginxreverse proxywebhooksdocker

How we test

We build a minimal stack (usually Docker Compose on a Debian test host), trigger the error, capture the output, apply one change, and capture the output again. We do not copy fixes from forums. When a version we tested goes stale, the page is re-tested or marked as outdated. Read the full method.