subscribe.php broken when wp-content is moved

Dir structure:

/www/index.php
/www/wp (wordpress)
/www/wp-content (plugins, themes, uploads etc)

Config:

$docroot 					= $_SERVER['DOCUMENT_ROOT'];
$hostname 					= $_SERVER['SERVER_NAME'];

define('WP_SITEURL', 		'http://'.$hostname.'/wp');
define('WP_HOME',    		'http://'.$hostname);

define('WP_CONTENT_DIR', 	$docroot.'/wp-content');
define('WP_CONTENT_URL', 	'http://'.$hostname.'/wp-content');

Error:

Warning: require_once(../../../../wp-load.php): failed to open stream: No such file or directory in /Users/james/Work/Projects/Kathy's Creative Flowers/WebsiteTest/www/wp-content/plugins/newsletter/do/subscribe.php on line 16

https://wordpress.org/plugins/newsletter/