AI Tools
How to Re-Enable Chat Hub in n8n 3.0: Restore the Chat Section After Upgrade
n8n 3.0 turns off Chat Hub by default. Re-enable it with N8N_ENABLED_MODULES, verify the Chat section returns, and plan migration before n8n 4.0 removes it.
Docker
n8n
How to Enable n8n OpenTelemetry Tracing: Workflow Spans, Node Spans, and Slow-Node Debugging
Enable native n8n OpenTelemetry tracing: set two environment variables or use Settings > OpenTelemetry, send spans to Jaeger or Grafana, and find slow nodes.
n8n
n8n S3 Binary Data Storage: Complete Tutorial (AWS, R2, Queue Mode, Lifecycle Rules)
Move n8n binary data off RAM and disk into Amazon S3. Setup with S3-compatible R2 config, queue-mode worker sync, lifecycle pruning, and the 2.6.4 region fix.
n8n
How to Downgrade n8n in Docker: Rollback Guide with db:revert (2026)
Downgrade n8n in Docker safely: revert database migrations with n8n db:revert on the current version first, then pin the older image tag and restart the stack.
n8n
n8n Workflow Force-Stopped After Hours? Fix Out-of-Memory Crashes with Batch Processing
n8n workflows dying after hours with no node error are usually memory kills. Diagnose the crash, then fix it with batching, execution pruning, and heap caps.
n8n
How to Fix n8n Schedule Trigger Firing at the Wrong Time in Docker: The Timezone Layer Cake
n8n Schedule Trigger fires hours off? Fix Docker timezone bugs by setting node Timezone, workflow timezone, and GENERIC_TIMEZONE in the right order.
n8n
How to Fix n8n Code Node Not Reading Environment Variables ($env Undefined)
Fix n8n Code node environment variable errors: restore $env access safely with N8N_BLOCK_ENV_ACCESS_IN_NODE, Python runner settings, and allowlist alternatives.
n8n
n8n AI Agent Race Conditions: 3 Atomic Claiming Patterns
Prevent double bookings from concurrent n8n AI agents: atomic claim with INSERT ON CONFLICT, a pending/done two-phase, and re-read state before writes.
n8n
How to Fix n8n Telegram Trigger Not Working: A 6-Step Diagnostic Checklist
Fix the n8n Telegram Trigger not firing: diagnose with getWebhookInfo, re-register the webhook, then check test URLs, privacy mode, and N8N_WEBHOOK_URL.
n8n
How to Migrate n8n from SQLite to PostgreSQL Without Losing Workflows
Migrate n8n from SQLite to PostgreSQL with the CLI: export entities, provision Postgres, repoint n8n via DB_POSTGRESDB_* variables, import, and verify.