Incorrect include script

The screenshot you posted also has this right below it:

The script must be loaded using the HTTPS protocol and can be included from any point on the page without restriction.

Which states that you can include the script anywhere – doesn’t have to be in the head. The fact that it is loaded with the async and defer attributes means it really doesn’t have to be in the head at all. I don’t think this is an issue and if the script isn’t loading for you then it’s for some other reason.