[apache] client denied by server configuration

For me the following worked which is copied from example in /etc/apache2/apache2.conf:

<Directory /srv/www/default>
    Options Indexes FollowSymLinks
    AllowOverride None
    Require all granted
</Directory>

Require all granted option is the solution for the first problem example in wiki.apache.org page dedicated for this issue for Apache version 2.4+.

More details about Require option can be found on official apache page for mod_authz module and on this page too. Namely:

Require all granted -> Access is allowed unconditionally.