Not working on 3.6, giving warnings

Warning: Missing argument 2 for bang_fs_get(), called in \bang-faceted-search\functions\init.php on line 141 and defined in \bang-faceted-search\functions\init.php on line 85

Warning: Invalid argument supplied for foreach() in \bang-faceted-search\functions\init.php on line 113

http://wordpress.org/plugins/bang-faceted-search/