AMP header scripts not getting inserted

Hi,
I’m trying to incorporate a couple of header scripts on AMP pages for my website.
I’ve followed the details mention on https://adinserter.pro/documentation/amp-pages for inserting the header scripts for AMP pages.

But it seems, the script is not getting inserted. Please see this image for the current header settings of the plugin: https://ibb.co/WFtrqv3

Please help as to how can I solve this issue, as I’m not able to insert scripts from my adnetwork on AMP pages.

For reference, I’m using “Reader mode” with “AMP Legacy” theme on AMP plugin.

The page I need help with: [log in to see the link]