Warning after installing update

I’ve got this warning after installing version 3.8.1 :

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘nxs_snap_pointer_admin_enqueue_scripts’ not found or invalid function name in /home/…………../public_html/wp-includes/class-wp-hook.php on line 298

I tried to deactivate and activate the plugin again but this didn’t help.