SOLUCE : Fatal error: on line 159 : bp-group-tags.php

After deleting the “&” in this line the error message is gone 🙂

$paged_groups2 = BP_Groups_Group::get_group_extras( &$paged_groups2, $group_ids, ‘popular’ );

Thx maddogmcewan

http://wordpress.org/extend/plugins/buddypress-group-tags/