Diagnose workflow failures with Google Gemini, Google Sheets and Slack
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 8 nodes and runs when another workflow fails (error workflow). Along the way it connects Google Gemini Chat Model, Google Sheets and Slack.
How it runs
Trigger: When another workflow fails (error workflow).
- Extract Error Details (Code): runs custom JavaScript code
- Diagnose Error with Gemini (Basic LLM Chain): sends a prompt to an LLM, with model: Google Gemini Chat Model; output parser: Diagnosis Parser
- Shape Diagnosis (Code): runs custom JavaScript code
- Log Error (Google Sheets): append
- Alert Slack (Slack): uses Slack
Services it uses
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (7)
- Error Trigger
n8n-nodes-base.errorTrigger - Code
n8n-nodes-base.code - Basic LLM Chain
@n8n/n8n-nodes-langchain.chainLlm - Google Gemini Chat Model
@n8n/n8n-nodes-langchain.lmChatGoogleGemini - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured - Google Sheets
n8n-nodes-base.googleSheets - Slack
n8n-nodes-base.slack
From the author
Quick Overview This error-handling workflow captures failures from other n8n workflows, uses Google Gemini to diagnose the cause in plain language, logs each incident to Google Sheets, and sends a detailed alert to a Slack channel with a link to the failed…