Script immediately after BODY opening

Dear tagDiv Staff,

Many advertising networks require to place ADS script immediately after BODY opening, and common plugins (like Insert Header and Footer plugin) fail to do it with Newspaper theme.
So in the past I used this method with success:

FUNCTIONS.PHP
function custom_content_after_body_open_tag() {
?>
XXX CUSTOM CODE XXX
<?php
}
add_action(‘after_body_open_tag’, ‘custom_content_after_body_open_tag’);

HEADER
<?php do_action(‘after_body_open_tag’); ?>

But now, after I updated Newspaper theme to the latest version, it doesn’t work anymore.

And I have also disabled STANDARD PACK to speed up website, considering that I’m working now only with Cloud Templates stuff, so I cannot use the HEADER of the STANDARD PACK to place the code.

Any suggestions to place Scripts immediately after BODY opening without using STANDARD PACK?

Best Regards,
Marco