Tableau logo
→
Slack logo

Fix Tableau → Slack Sync Issues (Not Working, Errors, Duplicates)

🔧 1 Common Issues

Diagnose and resolve common sync problems. We've documented the 1 most common issues, their root causes, and exactly how to fix them. See step-by-step fixes for duplicates, missing fields, rate limit errors, and connection issues.

medium High Frequency

Slack alert shows a broken image icon instead of the Tableau dashboard snapshot.

Also searched as: "Tableau Slack slack alert shows a broken image icon instead of the tableau dashboard snapshot."

#1 VPC / Firewall Blocking 90% likely

📋 How to Diagnose

  1. 1. Is Tableau Server hosted behind a corporate firewall?
  2. 2. Slack servers cannot reach the internal image URL to unfurl the preview.

✓ Solution

Use n8n installed behind your firewall to fetch the image via Tableau API and upload it to Slack as a native file attachment.

⏱️ Est. time: 45 min

Use n8n → →
View Setup Guide

Step 1: Try the Official Integration

Direct connection

Start with the native integration if available. It's usually the most reliable, but may have limitations.

View Setup Guide

Free with your subscription

Step 2: Use Make for Custom Flows

No code automation

Create custom integration workflows with Make's visual designer. It works with almost any API.

Try Make Free →

1000 ops/mo free. No credit card.

Step 3: Self-Hosted with n8n

Full data control

Need complete data privacy? n8n is open-source and self-hostable. Build custom integrations with full control over your data.

Try n8n Free →

Open source. Self-host or cloud. Unlimited ops.

Step 4: Add Human Review

Approval automation

Relay adds human-in-the-loop approvals, Slack/Teams alerts, and conditional logic to your automation.

Try Relay Free →

1000 actions/mo free. No credit card.