Comment 1 for bug 1953222

The apache2 error log did not have more information:

/etc# ls -l /var/log/apache2/
total 0
-rw-r----- 1 root adm 0 Dec 4 10:48 access.log
-rw-r----- 1 root adm 0 Dec 4 10:48 error.log
-rw-r----- 1 root adm 0 Dec 4 10:48 other_vhosts_access.log

The config file that is tripping it up is /etc/apache2/mods-enabled/alias.conf, which apart from empty lines and comment lines contains

<IfModule alias_module>
        Alias /icons/ "/usr/share/apache2/icons/"

        <Directory "/usr/share/apache2/icons">
                Options FollowSymlinks
                AllowOverride None
                Require all granted
        </Directory>
</IfModule>

I don't know why this would be a problem.