Error in calDav calendar sync

[Rik]

hi,
I’m getting the error below lately in Evolution connecting to my Nextcloud CalDav account from /e/ (www.e.foundation).
Anyone any idea how to fix this?

When I go to the calendar’s properties, it does seem to connect because I can still select which calendar i want to sync.
Rik
Using Evolution 3.44.4-0ubuntu1
on
Operating System: Kubuntu 22.04
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.3
Kernel Version: 5.15.0-52-generic (64-bit)
Graphics Platform: X11

[mcrha]

The precondition error usually means the local copy of the object (event/task/…) is out of sync with the server version, aka the server version had been updated, but the new version did not make it into the local cache yet. There’s usually enough to right-click the calendar name on the left of the Calendar view and pick Refresh from the context menu, to force update of the calendar.

Let me reference also yours Evolution Caldav appointments will not download (#2128) · Issues · GNOME / evolution · GitLab , which may explain why the local cache of your calendar is out of date with the server content. I suggest to continue in the 2128.