How to Fix Common Crazy Egg Click Tracker Errors

By Azon Vault On May 5, 2026

Introduction

Crazy Egg is a powerful heat‑mapping tool, but occasional click‑tracker errors can leave you guessing why data isn’t showing up. In this guide we’ll identify the most common issues, explain why they happen, and give you step‑by‑step fixes so your heatmaps start recording accurately again.

Why Click Tracker Errors Occur

Understanding the root cause makes troubleshooting faster. Most errors stem from:

Incorrect script placement – the tracking snippet is missing, duplicated, or placed in the wrong part of the page.
Conflicting JavaScript – other scripts (e.g., ad blockers, lazy‑load libraries) can block Crazy Egg from firing.
Cache and CDN issues – outdated files served from a CDN prevent the newest snippet from loading.
Permission settings – restrictive CSP headers or cookie settings stop the tracker from collecting data.

Step‑by‑Step Troubleshooting

1. Verify the Snippet Placement

Log in to Crazy Egg and copy the latest <script> tag.
Paste it immediately before the closing </head> tag on every page you want to track.
Ensure there is only one instance of the snippet per page.

2. Check for JavaScript Conflicts

Open the page in Chrome DevTools (F12) and look for errors in the Console tab.
If you see "CrazyEgg is not defined" or similar, note the line numbers of other scripts that run before Crazy Egg.
Move the Crazy Egg snippet lower in the <head> or add defer to the tag: <script src="..." defer></script>.

3. Clear Cache & CDN

After updating the snippet, purge any server‑side caches and CDN nodes. This ensures browsers fetch the newest script instead of a stale copy.

4. Review Content‑Security‑Policy (CSP) Headers

If your site uses CSP, add Crazy Egg domains to the script-src directive:

script-src 'self' https://script.crazyegg.com;

Also allow connect-src for data collection.

5. Test with Incognito Mode

Open an incognito window, disable extensions, and navigate to the tracked page. If heatmaps appear after a few minutes, the issue was likely an ad‑blocker or extension conflict.

FAQ

Q: My heatmap still shows “No Data” after following these steps.
A: Verify the Crazy Egg account is linked to the correct domain and that the tracking period is set to a recent timeframe.
Q: Can I use Crazy Egg on a single‑page app (SPA)?
A: Yes, but you must fire CrazyEgg.refresh() after each virtual navigation to record new clicks.
Q: Does using a content delivery network break Crazy Egg?
A: Only if the CDN caches an outdated snippet. Purge the cache after any script change.

Conclusion & CTA

Most Crazy Egg click‑tracker errors are simple configuration issues that you can resolve in minutes. By verifying script placement, clearing caches, and addressing CSP or JavaScript conflicts, you’ll get accurate heatmaps and actionable insights faster.

Ready to boost your conversions? Start a free Crazy Egg trial today and watch your click data come to life.