I'm at a loss as to why this was filed against the Calamares installer which is only used by Lubuntu, not Ubuntu proper. Additionally, this is not a bug but a support request, so I would suggest reaching out to the normal support resources, like e.g. AskUbuntu.com. What I will tell you is that there is no "easy" solution to the problem if you don't remember what files you deleted.
** Changed in: calamares (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1857034 Title: deleted AT SPI D files but unable to restore To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calamares/+bug/1857034/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs