Problem synchronizing users Gallery2<>CB

Installed:
Mambo 4.5.3
Gallery 2.2.3
Community builder 1.1.0

Having some major problems syncing my community builder contacts with Gallery2 contacts. I am using community builder for usermanagement on my Mambo site. Gallery 2.2.3 is installed and I have downloaded and installed the needed _mod and _com for embedding Gallery2.

com_gallery2-2.0.14-serbanc
mod_g2bridge_album
mod_g2bridge_comment
mod_g2bridge_image
mod_g2bridge_kwcloud
mod_g2bridge_side
mod_g2bridge_stats

So far that works fine. I am able to embed Gallery2 in my site.
Also installed plugin for community builder plug_g2bridge_v2.

Settings in Components/gallery2/settings are:

Gallery2 path: /home/vhosts/staalenco.nl/httpdocs/gallery/embed.php
Gallery2 url: http://www.staalenco.nl/gallery/
Login url: /index.php?option=com_cblogin

User: mirror -> yes, compare -> username

Now when I want to sync users in Components/gallery2/usermanagement, I get the following code:

******************************************************************************************
Error (ERROR_BAD_PARAMETER)

* in modules/core/classes/GalleryEmbed.class at line 334 (gallerycoreapi::error)
* in /home/vhosts/staalenco.nl/httpdocs/components/com_gallery2/classes/user.class at line 41 (galleryembed::createuser)
* in /home/vhosts/staalenco.nl/httpdocs/administrator/components/com_gallery2/admin.gallery2.php at line 519 (user::newuser)
* in /home/vhosts/staalenco.nl/httpdocs/administrator/components/com_gallery2/admin.gallery2.php at line 88
* in /home/vhosts/staalenco.nl/httpdocs/administrator/templates/mambo_admin_blue/index.php at line 86
* in /home/vhosts/staalenco.nl/httpdocs/administrator/index2.php at line 133
********************************************************************************************

I googled my way around but wasn't able to find a solution. All help is appreciated.