Salesforce Live Agent Chat Button Not Appearing on Website

This issue is typically caused by incomplete or missing deployment code on the host web page. The Salesforce Chat button requires three distinct code elements to be present: the Button Code (ID prefix 573), the Deployment Code (ID prefix 572), and the Organisation ID (prefix 00D). If any of these are absent or commented out, the button will not render.

Ensure the full and correct code deployed on the web page. 

1. Go to the web page where the code is hosted, check for message defined for online and offline agents is commented or not. If commented then remove the comments.
2. Right click on the page and click "Inspect Element". This will bring up the developer tools
3. Under the Elements tab, search for "573" which is the button code. If you find it, that means the button code is there. Then search for "572" to confirm that the Deployment code is present. Lastly, search for "00D" to confirm that the Org ID is present

All of those ID's need to be present on the web page for the button to appear correctly. If one of those is missing, please refer back to Setup in Salesforce so you can grab the Deployment code and Chat Button code and add it to your web page.