Hi after trying to upload a language xml file i get the following error:

Fatal error: Call to a member function xpath() on a non-object in /var/blabla/ow_system_plugins/admin/controllers/languages.php on line 403

Also i only get language_keys shown after installing a module and not the language_value

The 3 Problem is the FB Connect dont work as it should.

Can someone help me please?

Thanks