Hi there! I recently installed centos 8 on my laptop. I have the following problems 1. I tried the use the default evolution 3.28. The problem with 3.28 is that when i try to create an event i get the error "Failed to create an event in the calendar “CalDAV : Calendar”" "Cannot create calendar object: Failed to put data: HTTP error code 400 (Bad Request)" 2.I tried installing evolution from flatpak 3.34 Calendar works fine! BUT cant use my yubikey to read my encrypted emails :-( For some reason flatpak seems unable to work with smartcards. Had the same issue with keepassxc and yubikey 3.My third attempt was to use thunderbird from flatpak. I installed thunderbird through flatpak to see if i could overcome the flatpak yubikey problem. Thunderbird starts but then crushes with the following message "flatpak run org.mozilla.Thunderbird Gtk-Message: 09:15:00.372: Failed to load module "pk-gtk-module" Gtk-Message: 09:15:00.372: Failed to load module "canberra-gtk-module" Gtk-Message: 09:15:00.372: Failed to load module "pk-gtk-module" Gtk-Message: 09:15:00.372: Failed to load module "canberra-gtk-module" " I would prefer to use evolution than thunderbird. Any ideas how to solve the calendar or flatpak and yubikey problem? Thanks in advance!!!