assets not found after upgrading to perch 2.8.29

I have a strange behavior after upgrading. All admin's assets (js, css..) are not found despite the path seems correct. So my admin has no CSS layout nor js functionalities.

Perch information

Perch: 2.8.29
Production mode: Production (100)
Installed apps: content (2.8.29), categories (2.8.29), perch_forms (1.8.3)
DB driver: PDO
DB tables: perch2_categories (0), perch2_category_counts (0), perch2_category_sets (0), perch2_content_index (313), perch2_content_items (54), perch2_content_regions (8), perch2_forms (1), perch2_forms_responses (0), perch2_navigation (0), perch2_navigation_pages (0), perch2_page_templates (0), perch2_pages (5), perch2_resource_log (6), perch2_resource_tags (0), perch2_resources (11), perch2_resources_to_tags (0), perch2_settings (12), perch2_user_passwords (0), perch2_user_privileges (30), perch2_user_role_privileges (16), perch2_user_roles (2), perch2_users (1)
Users: 1
App runtimes:
<?php
    $apps_list = array(
        'content', 
        'categories',
        'perch_forms'
    );
Editor plug-ins: redactor, markitup
H1: 6d6077706d2c616456404995d89562b8
L1: 6c759663a1583c1f752a0df55c9d1522
F1: 2edba60ed1f613d6dd804feb202456a2
headerColour: #ffffff
content_singlePageEdit: 1
helpURL:
siteURL: /
hideBranding: 0
content_collapseList: 1
lang: en-gb
update_2.8.25: done
latest_version: 2.8.15
on_sale_version: 2.8.29
update_2.8.26: done
update_2.8.29: done
PERCH_DEVELOPMENT: 10
PERCH_STAGING: 50
PERCH_PRODUCTION: 100
PERCH_DB_USERNAME: xxxxxxxx
PERCH_DB_SERVER: xxxxxxxx
PERCH_DB_DATABASE: xxxxxxxx
PERCH_DB_PREFIX: perch2_
PERCH_TZ: Europe/Paris
PERCH_EMAIL_FROM: xxxxxxxx
PERCH_EMAIL_FROM_NAME: Nicolas Devaux
PERCH_LOGINPATH: /perch
PERCH_PATH: /home/aloearborescensc/public_html/perch
PERCH_CORE: /home/aloearborescensc/public_html/perch/core
PERCH_RESFILEPATH: /home/aloearborescensc/public_html/perch/resources
PERCH_RESPATH: /perch/resources
PERCH_HTML5: 1
PERCH_RUNWAY:
PERCH_ERROR_MODE: DIE
PERCH_DATE_LONG: %d %B %Y
PERCH_DATE_SHORT: %d %b %Y
PERCH_TIME_SHORT: %H:%M
PERCH_TIME_LONG: %H:%M:%S
PERCH_RUNWAY_ROUTED:
PERCH_STRONG_PASSWORDS:
PERCH_DEBUG:
PERCH_PREVIEW_ARG: preview
PERCH_TEMPLATE_PATH: /home/aloearborescensc/public_html/perch/templates
PERCH_DEFAULT_DOC: index.php
PERCH_DEFAULT_EXT: .php
PERCH_PRODUCTION_MODE: 100
PERCH_RWD:
PERCH_HTML_ENTITIES:
PERCH_SSL:
PERCH_STRIPSLASHES:
PERCH_PROGRESSIVE_FLUSH: 1
PERCH_PARANOID:
PERCH_FORCE_SECURE_COOKIES:
PERCH_PASSWORD_MIN_LENGTH: 6
PERCH_MAX_FAILED_LOGINS: 10
PERCH_AUTH_LOCKOUT_DURATION: 1 HOUR
PERCH_VERIFY_UPLOADS:
PERCH_AUTH_PLUGIN:
PERCH_DB_CHARSET: utf8
PERCH_DB_PORT:
PERCH_DB_SOCKET:
PERCH_SESSION_TIMEOUT_MINS: 20
Hosting settings

PHP: 5.6.21
Zend: 2.6.0
OS: Linux
SAPI: cgi-fcgi
Safe mode: not detected
MySQL client: mysqlnd 5.0.11-dev - 20120503 - $Id: 76b08b24596e12d4553bd41fc93cccd5bac2fe7a $
MySQL server: 5.5.5-10.0.25-MariaDB
Free disk space: 48.70 GB
Extensions: Core, date, ereg, libxml, openssl, pcre, sqlite3, zlib, bcmath, bz2, calendar, ctype, curl, dom, hash, filter, ftp, gd, gettext, SPL, iconv, session, json, mbstring, mcrypt, standard, mysqlnd, mysqli, posix, Reflection, mysql, imap, SimpleXML, soap, sockets, exif, tokenizer, xml, xmlreader, xmlrpc, xmlwriter, xsl, zip, cgi-fcgi, XCache, suhosin, PDO, pdo_sqlite, pdo_mysql, XCache Cacher, ionCube Loader
GD: Yes
ImageMagick: No
PHP max upload size: 24M
PHP max form post size: 128M
PHP memory limit: 256M
Total max uploadable file size: 24M
Resource folder writeable: Yes
Session timeout: 24 minutes
Native JSON: Yes
Filter functions: Yes
Transliteration functions: No
CONTEXT_DOCUMENT_ROOT: /home/aloearborescensc/public_html
DOCUMENT_ROOT: /home/aloearborescensc/public_html
GATEWAY_INTERFACE: CGI/1.1
HTTP_ACCEPT: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
HTTP_ACCEPT_ENCODING: gzip, deflate, sdch
HTTP_ACCEPT_LANGUAGE: fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4,es;q=0.2
HTTP_CONNECTION: keep-alive
HTTP_COOKIE: cmsa=1; PHPSESSID=b1b453a5a9043965f08e74d9fd8c4ec8
HTTP_HOST: aloe-arborescens-cancer.com
HTTP_REFERER: https://aloe-arborescens-cancer.com/perch/core/settings/diagnostics/
HTTP_UPGRADE_INSECURE_REQUESTS: 1
HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2741.0 Safari/537.36
PATH: /bin:/usr/bin
QUERY_STRING: extended
REDIRECT_STATUS: 200
REMOTE_ADDR: 82.229.239.56
REMOTE_PORT: 49719
REQUEST_METHOD: GET
REQUEST_SCHEME: http
REQUEST_URI: /perch/core/settings/diagnostics/?extended
SCRIPT_FILENAME: /home/aloearborescensc/public_html/perch/core/settings/diagnostics/index.php
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php
SERVER_ADDR: 85.236.157.164
SERVER_ADMIN: webmaster@aloe-arborescens-cancer.com
SERVER_NAME: aloe-arborescens-cancer.com
SERVER_PORT: 80
SERVER_PROTOCOL: HTTP/1.1
SERVER_SOFTWARE: Apache
UNIQUE_ID: Vz4MOlXsnaQAABnkbZgAAAFA
PHP_SELF: /perch/core/settings/diagnostics/index.php
REQUEST_TIME_FLOAT: 1463684154.21
REQUEST_TIME: 1463684154
argc: 1