Error when syncing: exceptions.NotFoundError(href)

[mike-lloyd03]

I've configured a google_calendar storage and have completed the oauth flow. Discovery works. But when syncing, I get the below error:

error: Unknown error occurred for google_to_local/mike@example.com: /caldav/v2/mike@example.com/events/_ccrj0gs62cpo75ijgdj3ckrmcpb560p40e9occs3ccj164s38o9j6ujfd1nisorfdk_R20250124T170000@google.com.ics
error: Use `-vdebug` to see the full traceback.
debug:   File "/usr/lib/python3.14/site-packages/vdirsyncer/cli/tasks.py", line 74, in sync_collection
debug:     await sync.sync(
debug:     ...<7 lines>...
debug:     )
debug:   File "/usr/lib/python3.14/site-packages/vdirsyncer/sync/__init__.py", line 149, in sync
debug:     a_nonempty = await a_info.prepare_new_status()
debug:                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
debug:   File "/usr/lib/python3.14/site-packages/vdirsyncer/sync/__init__.py", line 69, in prepare_new_status
debug:     async for href, item, etag in self.storage.get_multi(prefetch):
debug:     ...<4 lines>...
debug:         self.set_item_cache(item.ident, item)
debug:   File "/usr/lib/python3.14/site-packages/vdirsyncer/storage/dav.py", line 551, in get_multi
debug:     raise exceptions.NotFoundError(href)

My config:

[general]
status_path = "~/.local/share/vdirsyncer/status/"

[storage example_google_calendar]
type = "google_calendar"
token_file = "~/.local/share/vdirsyncer/token_file"
client_id = "***"
client_secret = "***"
start_date = "datetime(2026, 1, 1)"
end_date = "datetime(2100, 1, 1)"

[storage local_calendar]
type = "filesystem"
path = "~/.local/share/khal/calendars/"
fileext = ".ics"

[pair google_to_local]
a = "example_google_calendar"
b = "local_calendar"
collections = ["mike@example.com"]
conflict_resolution = "a wins"