sorry missed this post, ah well, better late then never

To only include a file as a droplet seems a bit weird, maybe better
to open the file, copy the contents to a droplet, remove the <?php ?> php tags
check for echo's since a dorplet can't echo
Maybe better to copy the content into a code section?
If yo uneed to include a file make sure paths are correct!
Sometimes a matter of trial and error.
John