[cflsystems]

I thought the Advanced Statistics module was removed from 4.6.3?
The bestsellers.php still has this code in

if (
    !empty($active_modules['Advanced_Statistics']) 
    && $config['Advanced_Statistics']['use_delayed_stats_update'] == 'Y'
) {
    // Flush all delayed queries to product data table
    func_run_delayed_query('views_stats_products'); 
}

Of course the module does not exist... not to mention this file is not in use probably....