Redmine

Environment:
  Redmine version                6.0.1.stable.23289
  Ruby version                   3.1.2-p20 (2022-04-12) [x86_64-linux-gnu]
  Rails version                  7.2.2
  Environment                    production
  Database adapter               PostgreSQL
  Mailer queue                   ActiveJob::QueueAdapters::SidekiqAdapter
  Mailer delivery                smtp
Redmine settings:
  Redmine theme                  Default
SCM:
  Subversion                     1.14.2
  Git                            2.39.5
  Filesystem                     
Redmine plugins:
  scrum                          0.23.1

Fresh installation of Redmine 6.0.1 (svn branch 6.0) running on standard Debian 12.
Default plugin works flawlessly.
Any other plugin even thoses shipped with Redmine do not work (see attached screenshots).

All themes mentioned above work as expected on identical setup running Redmine 5.1.4.