Error with Apache MPM itk

[Olivier Desport <olivier.desport@ac-versailles.fr>]

Hi,

I'm using mpm_itk module (on Apache 2.4.10 - Debian Jessie) but the web 
server returns 403 errors :

[Wed Mar 23 12:03:35.303631 2016] [core:error] [pid 18224] 
(13)Permission denied: [client 172.31.130.36:54815] AH00035: access to 
/favicon.ico denied (filesystem path '/var/www/portail/favicon.ico') 
because search permissions are missing on a component of the path, 
referer: http://edu-portail.ac-versailles.fr/portail.php

- My VH


DocumentRoot /var/www/portail

<IfModule mpm_itk_module>
AssignUserId portail portail
</IfModule>

<Directory /var/www/portail>
Options -Indexes +FollowSymLinks +MultiViews
Require all granted
</Directory>

- Rights :

ls -la /var/www/
drwxr-x--- 1 portail portail 2260 mars 2 13:20 portail

ls -la /var/www/portail/
rwxr-x--- 1 portail portail 2102 déc. 2 13:09 index.php
-rwxr-x--- 1 portail portail 6545 janv. 12 17:04 portail.php
[...]


It worked well on Wheezy and Apache 2.2. So, what can I do ?

Thanks.