> ## Documentation Index
> Fetch the complete documentation index at: https://docs.signalbridgedata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Pixel Not Firing

> When pixel.js fails to load

## Common causes

* DNS not propagated
* Incorrect tracking domain
* CSP blocks script

## Fix

* Recheck your CNAME
* Allow your tracking domain in CSP