I upgraded two of my sites to 3.0.4. and now I get this error:
Fatal error: Call to undefined function wp_get_current_user() in /var/www/virtual/mysite.com/htdocs/wp-content/plugins/plugins-language-switcher/plugins-language-switcher.php on line 134
I can't access the Dashboard because of the error above, and no may to fix this.
Please help!!!. How can I fix this?