Doesn't display/save the title and the content post, just the custom fields

I found a solution.

The problem was that the new title and content weren’t saved. So I did the following change.

In the plugin’s folder, in the Postdrafter.php file inside the create_draft function, after this line:

$post_data = array_intersect_key((array) $parent, $fields);

I added the following code:

$post_data['post_title'] = wp_strip_all_tags( $_POST['post_title'] );
$post_data['post_content'] = $_POST['post_content'];
$post_data['post_excerpt'] = $_POST['post_excerpt'];