[Plugin: LeagueManager] Error updating

Automatic Update of plugin returns me this: Fatal error: Call to undefined function register_uninstall_hook() in /home/user2177/public_html/ilsito/wp-content/plugins/leaguemanager/leaguemanager.php on line 71
and deactivate the plugin 🙁

http://wordpress.org/extend/plugins/leaguemanager/