TYPO3 Exception 1588095935


Below, the TYPO3 community may have provided additional information or solutions for this exception. However, these may or may not apply to your particular case. If you can provide more information, you should come back here and add your experience and solution steps to this issue once you have resolved it.

General TYPO3 troubleshooting tips can be found in the section “Troubleshooting” of the menu, and live support is available in the TYPO3 Slack channel #typo3-cms.

To add your experience, click “Edit on GitHub” above and follow the “Edit on GitHub” workflow. Also check out our tip on Coding Style and reST.


#1588095935 TYPO3\CMS\Core\Http\Security\MissingReferrerException
Missing referrer for /main

This error came up after logging into the backend or install tool after updating from TYPO3 9.5.16 to 9.5.20. The error was caused by the feature “security.backend.enforceReferrer” which was introduced in 9.5.17(?) and is enabled by default.


Disable the feature by editing LocalConfiguration.php:

'SYS' => [
        'features' => [
            'security.backend.enforceReferrer' => false,