Since updating to Active Directory plugin 2.29 (see https://plugins.jenkins.io/active-directory/#releases), some users cannot login anymore and also cannot be displayed anymore in the user view.

For the user that is broken in the user view, we get a response:
Status Code: 500
2022_12_13-broken-user-respone.html

When trying to login with this user we get:
https://our-jenkins/j_spring_security_check
Status Code: 500
2022_12_13-broken-user-login-respone.html

Some other users can login and be viewed via the user list, while some other ones can be viewed via the list but cannot login.

Rolling back to v2.28 fixed the issue.

While investigating that issue I also noticed that v2.29 was only tagged but never released on github: https://github.com/jenkinsci/active-directory-plugin/releases vs. https://github.com/jenkinsci/active-directory-plugin/tags
but the v2.29 still appears on jenkins plugins site: https://plugins.jenkins.io/active-directory/#releases

Also, it seems that the test pipeline for the tagged v2.29 version never actually ran:
https://github.com/jenkinsci/active-directory-plugin/commits
https://github.com/jenkinsci/active-directory-plugin/runs/9848751383
https://ci.jenkins.io/job/Plugins/job/active-directory-plugin/job/master/108/