This extension provides OpenID support for TYPO3 CMS. It is licensed under the same license as the TYPO3 CMS.
Documentation is available here.
If you suspect there is a bug, feel free to add the issue to the issue tracker on GitHub.
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',
...