[Plugin: Google Analytics for WordPress] Error when creating new sites

I’ve been using this plugin for a while now with no problems until this past week. Anytime I add a new site (I have WP set to multisite), the new site crashes with one of the two errors below unless I disable the plugin. All old sites previously configured work just fine.

Error messages:

Fatal error: Call to a member function set_defaults() on a non-object in /var/www/wp-content/plugins/google-analytics-for-wordpress/googleanalytics.php on line 1452

Fatal error: Call to undefined function wp_get_current_user() in /var/www/wp-content/plugins/google-analytics-for-wordpress/googleanalytics.php on line 1348

http://ww.wp.xz.cn/extend/plugins/google-analytics-for-wordpress/