OpenProject CE worked very well for over a year, all upgrades without any problem.
Yesterday after doing the upgrade to 7.4.5. I can’t login any more.
Error message is: 422 - “Cross-Site-Request-Forgery Token kann nicht verifiziert werden.”

How can I install an older version using apt-get on Debian?

I use deb https://dl.packager.io/srv/deb/opf/openproject-ce/stable/7/debian 9 main

Best regards and thanks
Andreas

Solved with
RequestHeader set X-Forwarded-Proto “https”
in the Apache config for the OpenProject virtual site.

thnx Oliver!