From duplicate:
/var/log/apache2/access.log is only accessible for root.adm, but the cronjob of awstats runs as www-data, so awstats can't access the logfile and won't work.
From duplicate:
/var/log/ apache2/ access. log is only accessible for root.adm, but the cronjob of awstats runs as www-data, so awstats can't access the logfile and won't work.