Your n8n workflow just failed. Fix it in 5 minutes — free.

The free edition of the n8n Reliability Kit Failure Library: 3 of the 21 most common production crashes — diagnosed, sourced, and with a fix you can literally copy.

No signup No credit card Runs 100% in your browser Sources linked on every fix

No error yet — checking a whole workflow before go-live? Run the free production-readiness audit →

Paste your raw n8n error

🔒 Timestamps, IDs and hashes are stripped locally — nothing leaves this page.

The 3 free diagnoses

Exactly the format the paid kit uses. Copy, apply, watch it turn green.

The other 18 in the full kit

Same depth. Same Copy-Fix buttons. Plus the 24-rule Workflow Auditor, the QA checklist, decision trees and 4 ready workflow blueprints.

A2Webhook fires in "Listen for test event" but never fires live
A3Browser calls to a webhook die with CORS errors
A4Scheduled trigger silently skips runs
B1`401 Unauthorized` / `403 Forbidden` from an external service
B2After import/migration: credentials "not found" or all credentials fail at once
B3`[upgrade]` After upgrading to n8n 2.x: owner-account setup screen — "all my data is gone"
C2`ENOTFOUND` / `ETIMEDOUT` when calling external hosts from a container
C3`SELF_SIGNED_CERT_IN_CHAIN` / `unable to verify the first certificate`
C4Editor shows "Connection lost" banner / real-time updates dead behind a reverse proxy
D1Long-running workflow gets stopped: execution timeouts
D2`Allocation failed — JavaScript heap out of memory` / container OOM-killed
D3`[queue mode]` Executions stuck in "Queued" / "Starting soon" forever
E2`No binary data exists on item` / binary file disappears mid-workflow
E3Items get mismatched/duplicated after IF–Switch–Merge
F1`429 Too Many Requests` — rate limits
F2Intermittent `5xx` / random failures on external services; duplicates after retries
G1Context-length / token-limit errors on AI nodes
G2AI Agent calls the wrong tool, malformed tool input, or "tool call failed"

Everything the paid plan unlocks

One license key · instant access on any device · all of this:

Workflow Auditor — 24 automated rulesnew

Paste any exported workflow JSON and get an instant 0–100 production-readiness score. Every finding is ranked Critical / High / Medium with the exact fix: missing error paths, hardcoded secrets (values never shown), localhost traps, unauthenticated webhooks, no timeouts or retries, pinned test data, orphan nodes, AI-agent guardrails and more.

One-click Auto-Fix + PDF reportnew

The auditor doesn't just point — it repairs: one click produces a corrected workflow JSON (timeouts, retries on idempotent methods only, execution timeout, pinned data) and re-scores it. Then export a client-ready PDF readiness report with your client's name on it — a deliverable agencies can hand over as-is.

Failure Library — all 21 entries

The 18 locked entries below included: webhook 404 "not registered", ECONNREFUSED 127.0.0.1 in Docker, credential deaths, queue-mode stalls, memory crashes, expression errors, rate limits, AI-agent failures — each with the exact error text, ranked root causes, copy-paste fix and prevention rules.

6 interactive decision trees

Start from your symptom — "works in test, fails live", "doesn't trigger", "broke after an update" — and branch your way down to the fix, guided for beginners, fast for experts.

34-point Preflight checklist

The go-live gate with explicit Go/No-Go criteria — including the Resilience & Monitoring sections everyone skips. Exports a client-ready PDF report you can attach to any delivery.

4 production blueprints

Importable n8n JSON, copy-paste from the dashboard: Global Error Handler (Telegram/Email alert the second any workflow fails), resilient API-call template (retries + timeouts + fallback pre-wired), Failure Monitor, Webhook Health Check.

Error-Doctor — full mode

The tool you just used, unlocked against all 21 failure entries instead of 3 — with full diagnostics, ranked causes and prevention for each.

n8n 2.x migration notes

The breaking changes that actually bite — re-checked against n8n stable 2.42.6 release notes (Oct 9, 2026), including the new deprecated-node save/import block. Sources cited; doc review, not a live-lab guarantee.

One payment, yours for good

One-time purchase with v1-line updates included. Works on any device with your license key. Zero telemetry in the app. 30-day money-back guarantee via Gumroad — one line and I refund.

What you get
Free
$0
Full Kit
$39 once
best
Error-Doctor diagnoses
3 failures
All 21, fully unlocked
Workflow audit (paste JSON)
5 checks · /free-audit
24 rules + readiness score
One-click Auto-Fix → corrected JSON
—
Client-ready PDF readiness report
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Decision trees
—
6 interactive trees
Preflight go-live checklist
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34 points + PDF export
Production workflow blueprints
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4 importable n8n JSON
n8n 2.x migration notes
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Future v1.x updates
—
Included forever

Stop debugging after things break.

Everything listed above — in one dashboard. Guided view for beginners, Pro view for experts. Buy once, and every future v1.x improvement lands in your dashboard automatically.

$39 one-time · v1-line updates included · ⭐ 5.0 (1 buyer rating)
Get instant access

Secure checkout via Gumroad · license key arrives with your receipt · zero telemetry in the app