Supreme Theme by GD is displaying UserID instead of Display Name

From public_html/wp-content/themes/supreme-directory/inc/geodirectory-compatibility.php. The user name is being displayed to the public – something that I don’t want. Looks like it is in this code block

if (!$preview) {
$author_id = $post->post_author;
$author_name = get_the_author_meta(‘display_name’, $author_id);
$entry_author = get_avatar(get_the_author_meta(’email’, $author_id), 100);
$author_link = get_author_posts_url($author_id);
$post_type = $post->post_type;
$post_tax = $post_type . “category”;
$post_cats = $post->{$post_tax};
} else {
$author_name = get_the_author_meta(‘display_name’, $user_id);
$entry_author = get_avatar(get_the_author_meta(’email’, $user_id), 100);
$author_link = get_author_posts_url($user_id);
$post_type = $post->listing_type;
$post_tax = $post_type . “category”;
$post_cats = isset($post->post_category) ? $post->post_category[$post_tax] : $post->{$post_tax};