Author box won't show (Marketer template)

Hi team,

I've been trying to add an author box with the code snippet provided in this ticket:

https://generatepress.com/forums/topic/how-to-add-author-box-and-notification-bar/#post-699300

I created a Hook Element but it seems there is a code error.

See these three images for your reference:

https://imgur.com/a/ERmApSn

I'm guessing it must be a syntax error somewhere.

Thanks!