Hi CookieYes Team,
thank you for your reply!
Then I’m not sure the code has been pasted properly. As I wrote there is no code regarding Google Tag Manager script or CookieYes script within my header.php file under wp-includes/theme-compat/header-php.
Probably it is the wrong header.php. Is there any other file where I can paste the CookieYes GTM template?
Thank you in advance