[Bug]: Lizmap web application does not start

What is the bug?

After following the installation instructions from https://docs.lizmap.com/3.5/en/install/linux.html, when I try to access lizmap mydomain/lizmap, I get this:

<?php
/**
* @package   lizmap
* @subpackage lizmap
* @author    3liz
* @copyright 2011 3liz
* @link      http://3liz.com
* @license    Mozilla Public License : http://www.mozilla.org/MPL/
*/

require ('../application.init.php');
require (JELIX_LIB_CORE_PATH.'request/jClassicRequest.class.php');

checkAppOpened();

// Charge la configuration
jApp::loadConfig('index/config.ini.php');

// nouveau coordinateur, que l'on indique Ã  jApp
jApp::setCoord(new jCoordinator());

// Nouvel objet request, que l'on passe au coordinateur, pour traiter le routage.
jApp::coord()->process(new jClassicRequest());

I have repeated the installation procedure several times but I have no idea what can be causing this.

Steps to reproduce the issue

My installation steps:

install packages sudo apt install xauth htop curl apache2 libapache2-mod-fcgid libapache2-mod-php7.4 php7.4-cgi php7.4-gd php7.4-sqlite php7.4-curl php7.4-xmlrpc python-simplejson software-properties-common php7.4-xml

create directories for data

mkdir /home/data
 mkdir /home/data/cache/
 mkdir /home/data/ftp
 mkdir /home/data/ftp/template/
 mkdir /home/data/ftp/template/qgis

download and unzip lizmap

> wget https://github.com/3liz/lizmap-web-client/releases/download/3.5.2/lizmap-web-client-$VERSION.zip
> unzip lizmap-web-client-3.5.2.zip

create profiles.ini.php cp profiles.ini.php.dist profiles.ini.php

configure support for postgres (it works because the tables are created when i run installer.php

[jdb:jauth]
driver=pgsql
host=localhost
port=5432
database="your_database"
and so on...

set rights for www-data user lizmap/install/set_rights.sh www-data www-data Create lizmapConfig.ini.php and localconfig.ini.php

cp lizmapConfig.ini.php.dist lizmapConfig.ini.php
cp localconfig.ini.php.dist localconfig.ini.php

Add demo project under the [modules] section of localconfig.ini.php (btwis never installed after running installer.php) lizmap.installparam=demo

Run the installer php installer.php

restart apache just in case (apache is working as I can access my home page for example) service apache2 restart

Versions

Lizmap 3.24 Lizmap plugin 3.7.4 QGIS 3.24.1

QGIS server version, only if the section above doesn't mention the QGIS Server version

3.24

Operating system

Ubuntu 20.04

Browsers

Firefox, Chrome, Microsoft Edge

Browsers version

Version 99.0.4844.82

Relevant log output

No response

3liz / lizmap-web-client