Whoops\Exception\ErrorException thrown with message "Undefined array key "HTTP_HOST""

Stacktrace:
#8 Whoops\Exception\ErrorException in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/src/Environment/HttpPathBuilder.php:43
#7 ilErrorHandling:handlePreWhoops in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/src/Environment/HttpPathBuilder.php:43
#6 ILIAS\Init\Environment\HttpPathBuilder:build in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilInitialisation.php:374
#5 ilInitialisation:buildHTTPPath in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilInitialisation.php:830
#4 ilInitialisation:initSettings in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilInitialisation.php:1315
#3 ilInitialisation:initClient in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilInitialisation.php:1168
#2 ilInitialisation:initILIAS in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/src/AllModernComponents.php:201
#1 ILIAS\Init\AllModernComponents:enter in /home/flighth-synology/ilias-lms/ILIAS-11.3/artifacts/bootstrap_default.php:2887
#0 entry_point in /home/flighth-synology/ilias-lms/ILIAS-11.3/public/index.php:48


-- GET Data --

empty


-- POST Data --

empty


-- Files --

empty


-- Cookies --

empty


-- Session --

empty


-- Server/Request Data --

SHELL                    : /bin/ovh_ssh
PWD                      : /homez.1609/flighth/ilias-lms/ILIAS-11.3/public
LOGNAME                  : flighth-synology
HOME                     : /homez.1609/flighth
LANG                     : fr_FR.UTF-8
SSH_CONNECTION           : 89.85.120.192 5385 5.135.42.197 22
USER                     : flighth-synology
SHLVL                    : 0
SSH_CLIENT               : 89.85.120.192 5385 22
PATH                     : /usr/local/php8.4/bin:/usr/local/bin:/usr/bin:/bin:/usr/games
MAIL                     : /var/mail/flighth-synology
OLDPWD                   : /home/flighth-synology
_                        : /usr/local/php8.4/bin/php
PHP_SELF                 : index.php
SCRIPT_NAME              : index.php
SCRIPT_FILENAME          : index.php
PATH_TRANSLATED          : index.php
DOCUMENT_ROOT            : 
REQUEST_TIME_FLOAT       : 1788120840.3971
REQUEST_TIME             : 1788120840
argv                     : Array
                         (
                             [0] => index.php
                         )
                         
argc                     : 1


-- Environment Variables --

SHELL                    : /bin/ovh_ssh
PWD                      : /homez.1609/flighth/ilias-lms/ILIAS-11.3/public
LOGNAME                  : flighth-synology
HOME                     : /homez.1609/flighth
LANG                     : fr_FR.UTF-8
SSH_CONNECTION           : 89.85.120.192 5385 5.135.42.197 22
USER                     : flighth-synology
SHLVL                    : 0
SSH_CLIENT               : 89.85.120.192 5385 22
PATH                     : /usr/local/php8.4/bin:/usr/local/bin:/usr/bin:/bin:/usr/games
MAIL                     : /var/mail/flighth-synology
OLDPWD                   : /home/flighth-synology
_                        : /usr/local/php8.4/bin/php