Only one 'enable_page_level_ads' allowed per page

I get the same error in my site.

Apparently the problem is for the push() method added in /adsense/templates/adsense-managed-page-level.html.twig
For auto ads, the push() script is not needed.

{% if not defer %}

{% else %}
{{ attach_library('adsense/adsense.adsbygoogle') }}
{% endif %}
{#

#}

Can you try the MR?

This MR worked for me. I don't have the "Only one 'enable_page_level_ads' allowed per page" error any more.

I now have this Deprecated function: urldecode(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\adsense\Controller\CseResultsController->display() (line 77 of /path_to_site/web/modules/contrib/adsense/src/Controller/CseResultsController.php). Not sure it is related to the MR but I haven't noticed this before.

The MR is working for me to resolve this error.

I am not seeing the deprecated function warning reported by @erwangel so I think that may have been related to something else.