RuntimeException thrown with message "Request rejected, the given HTTP host is not in the "allowed_hosts" list"

Stacktrace:
#7 RuntimeException in /home/flighth/ilias-lms/ILIAS-11.3/components/ILIAS/Init/src/Environment/HttpPathBuilder.php:101
#6 ILIAS\Init\Environment\HttpPathBuilder:build in /home/flighth/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilInitialisation.php:374
#5 ilInitialisation:buildHTTPPath in /home/flighth/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilInitialisation.php:830
#4 ilInitialisation:initSettings in /home/flighth/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilInitialisation.php:1315
#3 ilInitialisation:initClient in /home/flighth/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilInitialisation.php:1168
#2 ilInitialisation:initILIAS in /home/flighth/ilias-lms/ILIAS-11.3/components/ILIAS/Init/src/AllModernComponents.php:201
#1 ILIAS\Init\AllModernComponents:enter in /home/flighth/ilias-lms/ILIAS-11.3/artifacts/bootstrap_default.php:2887
#0 entry_point in /home/flighth/ilias-lms/ILIAS-11.3/public/index.php:48


-- GET Data --

empty


-- POST Data --

empty


-- Files --

empty


-- Cookies --

empty


-- Session --

empty


-- Server/Request Data --

USER                     : flighth
SCRIPT_NAME              : /ilias-lms/ILIAS-11.3/public/index.php
REQUEST_URI              : /ilias-lms/ILIAS-11.3/public/
QUERY_STRING             : 
REQUEST_METHOD           : GET
SERVER_PROTOCOL          : HTTP/1.1
GATEWAY_INTERFACE        : CGI/1.1
REMOTE_PORT              : 25950
SCRIPT_FILENAME          : /home/flighth/ilias-lms/ILIAS-11.3/public/index.php
SERVER_ADMIN             : postmaster@ia.flightpaper.fr
REMOTE_ADDR              : 2a02:6ea0:d509:1::a09d
SERVER_PORT              : 443
SERVER_ADDR              : 10.131.40.4
SERVER_NAME              : ia.flightpaper.fr
SERVER_SOFTWARE          : Apache
SERVER_SIGNATURE         : 
HTTP_REMOTE_IP           : 2a02:6ea0:d509:1::a09d
HTTP_ACCEPT_ENCODING     : gzip
HTTP_USER_AGENT          : Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
HTTP_X_OVHREQUEST_ID     : 2e54062fe94afd6a3f6fca09301348a4
HTTP_X_FORWARDED_PROTO   : https
HTTP_X_FORWARDED_FOR     : 2a02:6ea0:d509:1::a09d
HTTP_X_PREDICTOR         : 1
HTTP_HOST                : ia.flightpaper.fr
CFG_CLUSTER              : cluster131
HTTP_AUTHORIZATION       : 
HTTPS                    : on
SCRIPT_URI               : https://ia.flightpaper.fr:443/ilias-lms/ILIAS-11.3/public/
SCRIPT_URL               : /ilias-lms/ILIAS-11.3/public/
UNIQUE_ID                : ap3cjR24J1oxElFHqeSF5gAAAC0
DOCUMENT_ROOT            : /home/flighth/.
ENVIRONMENT              : production
APP_ENGINE_VERSION       : 8.4
APP_ENGINE               : php
FCGI_ROLE                : RESPONDER
PHP_SELF                 : /ilias-lms/ILIAS-11.3/public/index.php
REQUEST_TIME_FLOAT       : 1788730509.3223
REQUEST_TIME             : 1788730509
argv                     : Array
                         (
                         )
                         
argc                     : 0


-- Environment Variables --

USER                     : flighth
SCRIPT_NAME              : /ilias-lms/ILIAS-11.3/public/index.php
REQUEST_URI              : /ilias-lms/ILIAS-11.3/public/
QUERY_STRING             : 
REQUEST_METHOD           : GET
SERVER_PROTOCOL          : HTTP/1.1
GATEWAY_INTERFACE        : CGI/1.1
REMOTE_PORT              : 25950
SCRIPT_FILENAME          : /home/flighth/ilias-lms/ILIAS-11.3/public/index.php
SERVER_ADMIN             : postmaster@ia.flightpaper.fr
REMOTE_ADDR              : 2a02:6ea0:d509:1::a09d
SERVER_PORT              : 443
SERVER_ADDR              : 10.131.40.4
SERVER_NAME              : ia.flightpaper.fr
SERVER_SOFTWARE          : Apache
SERVER_SIGNATURE         : 
HTTP_REMOTE_IP           : 2a02:6ea0:d509:1::a09d
HTTP_ACCEPT_ENCODING     : gzip
HTTP_USER_AGENT          : Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
HTTP_X_OVHREQUEST_ID     : 2e54062fe94afd6a3f6fca09301348a4
HTTP_X_FORWARDED_PROTO   : https
HTTP_X_FORWARDED_FOR     : 2a02:6ea0:d509:1::a09d
HTTP_X_PREDICTOR         : 1
HTTP_HOST                : ia.flightpaper.fr
CFG_CLUSTER              : cluster131
HTTP_AUTHORIZATION       : 
HTTPS                    : on
SCRIPT_URI               : https://ia.flightpaper.fr:443/ilias-lms/ILIAS-11.3/public/
SCRIPT_URL               : /ilias-lms/ILIAS-11.3/public/
UNIQUE_ID                : ap3cjR24J1oxElFHqeSF5gAAAC0
DOCUMENT_ROOT            : /home/flighth/.
ENVIRONMENT              : production
APP_ENGINE_VERSION       : 8.4
APP_ENGINE               : php
FCGI_ROLE                : RESPONDER
PHP_SELF                 : /ilias-lms/ILIAS-11.3/public/index.php
REQUEST_TIME_FLOAT       : 1788730509.3223
REQUEST_TIME             : 1788730509
argv                     : Array
                         (
                         )
                         
argc                     : 0