Help with customising love it plugin (use within foreach)

A couple of problems-

setup_postdata doesn’t work with any variable other than $post, so that line is doing nothing. This is explained on the Codex page for setup_postdata.

get_the_ID doesn’t accept any arguments, but it doesn’t matter, you’ve already got the ID in $event->ID, just change all instances of get_the_ID($event->ID) to $event->ID.