white screen... [as blue screen :) ]

/translate/languages - For all user in a OG translation group I see only white screen...
apacehe error:
===================
PHP Fatal error: Call to undefined function l10n_community_get_groups() in /home/.../modules/l10n_server/l10n_groups/l10n_groups.module on line 261
===================

from 
function l10n_groups_get_permission(&$permissions, $global_permission, $langcode, $account = NULL) {
  if ($groups = l10n_community_get_groups()) {
    // Fill up local cache with all langcode permissions of this account for

where l10n_community_get_groups() ?
Not all admin on my site :-(