Backups fail on "no logging directive found in webserver configuration!"

Hi,

I have a problem with backing up virtual servers. It's both on Ubuntu 12.04 en 14.04 using Virtualmin 4.18.gpl.

When backing up a server, it warns about:

 Copying Webalizer configuration files ..
.. no logging directive found in webserver configuration!
 
Copying Logrotate configuration ..
.. Error: no log rotation configuration found!

Last week I changed the logging in Apache and therefore changed Server Templates --> Apache website --> Directives and settings for new websites into:

ServerName ${DOM}
ServerAlias www.${DOM}
DocumentRoot ${HOME}/public_html
ErrorLog "|$/usr/bin/tee -a /var/log/virtualmin/${DOM}_error_log | /usr/bin/logger -t apache2 -p local1.error"
CustomLog "|$/usr/bin/tee -a /var/log/virtualmin/${DOM}_access_log | /usr/bin/logger -t apache2 -i -p local1.info" vhost_combined
ScriptAlias /cgi-bin/ ${HOME}/cgi-bin/
DirectoryIndex index.html index.htm index.php index.php4 index.php5
<Directory ${HOME}/public_html>
Options -Indexes +IncludesNOEXEC +SymLinksIfOwnerMatch
allow from all
AllowOverride All Options=ExecCGI,Includes,IncludesNOEXEC,Indexes,MultiViews,SymLinksIfOwnerMatch
</Directory>
<Directory ${HOME}/cgi-bin>
allow from all
AllowOverride All Options=ExecCGI,Includes,IncludesNOEXEC,Indexes,MultiViews,SymLinksIfOwnerMatch
</Directory>

In Server Templates I also made a custom template for logrotate:

/var/log/virtualmin/${DOM}_access_log /var/log/virtualmin/${DOM}_error_log {
        rotate 5
        weekly
        compress
        postrotate
        /usr/sbin/apache2ctl graceful ; sleep 5
        endscript
        sharedscripts
}

In existing sites I modified ErrorLog and CustomLog by hand into:

ErrorLog "|/usr/bin/tee -a /var/log/virtualmin/DOMAIN_error_log | /usr/bin/logger -t apache2 -p local1.error"
CustomLog "|/usr/bin/tee -a /var/log/virtualmin/DOMAIN_access_log | /usr/bin/logger -t apache2 -p local1.info" vhost_combined

Backing up of existing and newly created sited now all fail with the errors I mentioned above. Maybe someone has a suggestion of what to do now?

Thank you, Alexander