Upgrade error

Hi, when I upgrade to the latest version of the plugin I get the following fatal error: Help!

“Warning: require_once(/x/wp-content/plugins/customer-area/includes/addon.class.php) [function.require-once]: failed to open stream: No such file or directory in /x/wp-content/plugins/customer-area-collaboration/includes/collaboration/collaboration-addon.class.php on line 4

Fatal error: require_once() [function.require]: Failed opening required ‘x/wp-content/plugins/customer-area/includes/addon.class.php’ (include_path=’.:/usr/share/php:/usr/share/pear’) in x/wp-content/plugins/customer-area-collaboration/includes/collaboration/collaboration-addon.class.php on line 4″

Hosting on wpengine

https://ww.wp.xz.cn/plugins/customer-area/