Fatal error

Hi,

I’m using
– WP 4.4.2 multisite
– plugin version 1.6.4
– I’m logged in as the super-admin of this network
– Premium Theme SimpleMag from Themeforest

When I try to configure “Google Analytics Setup”, I cannot access this settings page; I get a fatal error:

Fatal error: Call to undefined function wp_get_current_user() in ............./wp-includes/capabilities.php on line 424

All other settings of the plugin are accessible and okay.

I disabled all other plugins to see if there is a conflict, but no success. Any fix please?

Thank you.

https://ww.wp.xz.cn/plugins/social-metrics-tracker/