Great, thank you!
There is a manually added GTM container code in your site.
Here is what you can do:
– if you are using any plugin that provides you the option to add codes to the site header, check whether there is this container code
– some themes offer the same functionality that you might want to check
– you should also check your theme’s header.php file
This is the code that you should look at:
<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-TJJDCWL"
height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-TJJDCWL');</script>
<!-- End Google Tag Manager (noscript) -->
Let me know if you’ve found the solution.
Thomas