Cannot add particular CalDAV calendar
I have a CalDAV calendar here:
https://posteo.de:8443/calendars/mcatanzaro/default/
It works fine if I add it in Evolution. But if I try to add it using GNOME Calendar's add calendar dialog instead of with Evolution, it doesn't work. GNOME Calendar allows me to create the calendar, but it doesn't display any events and instead shows these warnings:
(gnome-calendar:93836): GcalManager-WARNING **: 16:06:18.088: source_credentials_required_cb: Failed to authenticate 'Standardkalender': Connection terminated unexpectedly
(gnome-calendar:93836): GcalManager-WARNING **: 16:06:33.337: source_credentials_required_cb: Failed to authenticate 'Standardkalender': Connection terminated unexpectedly
This calendar works perfectly fine in GNOME Calendar as long as I use Evolution to create it. The calendar is also broken in Evolution if created in GNOME Calendar.
Possibly-related: even before I provided my authentication credentials, when adding the calendar, gnome-calendar printed this:
(gnome-calendar:93836): libsoup-WARNING **: 16:06:00.643: SoupMessage 0x621000037e50 stuck in infinite loop?