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n8n errors / Config

Connection Lost (workflow editor, behind nginx reverse proxy)

platform: n8n / category: Config

Cause

The nginx location block is missing the WebSocket upgrade headers, so the push/SSE channel n8n uses for editor live-updates is dropped by the proxy.

Fix

Add to the n8n location block: proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "upgrade"; Also set proxy_set_header Host $host; and X-Forwarded-Proto $scheme;. Reload nginx and hard-refresh the browser.

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