A few problems

For the info window, we don’t show the excerpt, you can set custom fields to show there but not the actual excerpt, i have updated and applied changes to the code

add_action('geodir_infowindow_meta_after','my_theme_add_infowindow_meta',10,2);

function my_theme_add_infowindow_meta($postinfo_obj,$post_preview ){
$text = apply_filters('the_excerpt', get_post_field('post_excerpt', $postinfo_obj->post_id));
echo $text;
echo " <a href=' ".get_the_permalink()." '>Read More...</a>";
}

The post_author=”current” is for showing listings of the current posts author, so this can be used to get listings of for example and event listing and show in another tab, not the logged in user, but i can see how that can be confusing, i have now added new params and updated your page

Thanks,

Stiofan

Great 🙂