.. include:: /Includes.rst.txt ========================== TYPO3 Exception 1588095935 ========================== .. include:: /If-you-encounter-this-exception.rst.txt TYPO3\\CMS\\Core\\Http\\Security\\MissingReferrerException ========================================================== .. code-block:: text #1588095935 TYPO3\CMS\Core\Http\Security\MissingReferrerException Missing referrer for /main This error occurs when logging into the backend or install tool and is triggered by a failed check of a referer header. The reason for this is the usage of an HTTP proxy, for example a reverse proxy to an encapsulated system without sufficient header delegation. Solution -------- The feature was introduced due to potential security risks, visit the related `security advisory `__ for more information. The feature can be enabled or disabled in :guilabel:`Admin Tools > Settings > Configure Installation-Wide Options > System > [SYS][features][security.backend.enforceReferrer]`. It is recommended that you keep this feature enabled.