Magento 1.9.3.

Installed https://marketplace.magento.com/chapagain-chapagain-googletagmanager.html and it is working properly when viewed source code the GTM tag starts and ends immediately after tag opens.

I have added Facebook Custom Chat Plugin code as advised https://www.simoahava.com/analytics/add-facebook-messenger-chat-google-tag-manager/ but the chat window still won't show on my website.


It worked. I had forgotten to publish the tag in GTM.

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