Troubleshooting

Login fails since TYPO3 8.7.31 and 9.5.14

These versions of TYPO3 introduced a SameSite cookies support, which broke OpenID authentication. The fix is to make sure that you have the following in your web/typo3conf/LocalConfiguration.php:

return [
    'BE' => [
        'cookieSameSite' => 'lax',
        ...