==== Required information ====
- iRedMail version (check /etc/iredmail-release): 2.3.1
- Linux/BSD distribution name and version: ubuntu
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  mysql
- Web server (Apache or Nginx): apache
- Manage mail accounts with iRedAdmin-Pro? Yes
- Related log if you're reporting an issue:
====

I keep getting this error in the mail:

Error while processing /etc/awstats/awstats.web.conf
Create/Update database for config "/etc/awstats/awstats.web.conf" by AWStats version 7.2 (build 1.992)
From data in log file "/var/log/apache2/access.log"...
Error: Couldn't open server log file "/var/log/apache2/access.log" : Permission denied
Setup ('/etc/awstats/awstats.web.conf' file, web server or permissions) may be wrong.
Check config file, permissions and AWStats documentation (in 'docs' directory).
Error while processing /etc/awstats/awstats.conf
Create/Update database for config "/etc/awstats/awstats.conf" by AWStats version 7.2 (build 1.992)
From data in log file "/var/log/apache2/access.log"...
Error: Couldn't open server log file "/var/log/apache2/access.log" : Permission denied
Setup ('/etc/awstats/awstats.conf' file, web server or permissions) may be wrong.
Check config file, permissions and AWStats documentation (in 'docs' directory).

Please advise on how to fix.
Thank you