Implementing Klaviyo using the GTM tag

Hello, 
Please help with the implementation of Klaviyo. We are unable to deploy klaviyo using the GTM tag. Everything was done correctly, the tag works and turns on, but when I try to verify the domain, unfortunately the message “The script was not installed correctly” pops up.
I did everything according to the instruction manual from this page: 
https://help.klaviyo.com/hc/en-us/articles/360015392131 
It does not say that you have to paste the code in the “head” section of the page code. 
 

I would be very grateful for your help