Whoops\Exception\ErrorException thrown with message "Cannot modify header information - headers already sent by (output started at /home/flighth-synology/ilias-lms/ILIAS-11.3/public/index.php:38)"

Stacktrace:
#7 Whoops\Exception\ErrorException in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilErrorHandling.php:310
#6 header in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/class.ilErrorHandling.php:310
#5 ilErrorHandling:{closure:ilErrorHandling::defaultHandler():270} in /home/flighth-synology/ilias-lms/ILIAS-11.3/vendor/composer/vendor/filp/whoops/src/Whoops/Handler/CallbackHandler.php:50
#4 Whoops\Handler\CallbackHandler:handle in /home/flighth-synology/ilias-lms/ILIAS-11.3/components/ILIAS/Init/classes/ErrorHandling/class.ilDelegatingHandler.php:106
#3 ilDelegatingHandler:handle in /home/flighth-synology/ilias-lms/ILIAS-11.3/vendor/composer/vendor/filp/whoops/src/Whoops/Run.php:403
#2 Whoops\Run:handleException in /home/flighth-synology/ilias-lms/ILIAS-11.3/vendor/composer/vendor/filp/whoops/src/Whoops/Run.php:487
#1 Whoops\Run:handleError in /home/flighth-synology/ilias-lms/ILIAS-11.3/vendor/composer/vendor/filp/whoops/src/Whoops/Run.php:520
#0 Whoops\Run:handleShutdown in [internal]:0


-- GET Data --

empty


-- POST Data --

empty


-- Files --

empty


-- Cookies --

empty


-- Session --

failure                  : Sorry, an error occured. A logfile has been created which can be identified via the code "_8034".


-- 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