Steps to reproduce
- Enable Deck calendar/tasks integration for a user.
- The user owns active Deck boards.
- Configure calendar delegation between two Nextcloud users.
- Open/reload the Calendar app as the user who receives the delegated calendar.
- Calendar fails to load the delegated calendars.
- DAV debugging shows an error for a Deck-generated calendar node, for example:
Sabre\DAV\Exception\NotFound
Node with name 'app-generated--deck--board-105' could not be found
The referenced Deck board exists and is neither deleted nor archived.
- Disable Deck calendar/tasks integration for the affected user.
- Reload the Calendar app.
The delegated calendars now load correctly.
The issue is reproducible: enabling the Deck calendar integration causes the problem again; disabling it immediately resolves it.
Expected behavior
Deck calendar integration should not interfere with Calendar delegation.
Existing Deck boards should be correctly exposed as app-generated CalDAV calendar nodes. If a Deck-generated calendar node cannot be resolved, this should not prevent unrelated delegated calendars from being loaded.
Calendar delegation should work regardless of whether Deck calendar/tasks integration is enabled.
Actual behavior
With Deck calendar/tasks integration enabled, Calendar delegation fails and the Calendar app displays:
Delegated calendars could not be loaded.
Make sure the server supports calendar delegation.
The server does support calendar delegation. The delegation itself is correctly stored in oc_dav_cal_proxy, and normal CalDAV requests work.
During the failing request, SabreDAV reports:
<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
<s:exception>Sabre\DAV\Exception\NotFound</s:exception>
<s:message>Node with name 'app-generated--deck--board-105' could not be found</s:message>
</d:error>
The referenced Deck board exists in oc_deck_boards, is active, and is not deleted or archived.
Other Deck-generated calendar nodes for the same environment can be accessed successfully.
As soon as Deck calendar/tasks integration is disabled for the affected user, calendar delegation works immediately. Re-enabling the integration reproduces the issue.
Calendar app version
6.5.3
CalDAV-clients used
No response
Browser
No response
Client operating system
No response
Server operating system
No response
Web server
None
Database engine version
None
PHP engine version
None
Nextcloud version
34.0.3
Updated from an older installed version or fresh install
None
List of activated apps
Nextcloud configuration
Web server error log
Log file
Browser log
Additional info
The troubleshooting and analysis of this issue was assisted by AI. All described behavior, reproduction steps, database queries, DAV responses, and test results were verified against the actual Nextcloud environment before submitting this issue.
Steps to reproduce
Sabre\DAV\Exception\NotFound
Node with name 'app-generated--deck--board-105' could not be found
The referenced Deck board exists and is neither deleted nor archived.
The delegated calendars now load correctly.
The issue is reproducible: enabling the Deck calendar integration causes the problem again; disabling it immediately resolves it.
Expected behavior
Deck calendar integration should not interfere with Calendar delegation.
Existing Deck boards should be correctly exposed as app-generated CalDAV calendar nodes. If a Deck-generated calendar node cannot be resolved, this should not prevent unrelated delegated calendars from being loaded.
Calendar delegation should work regardless of whether Deck calendar/tasks integration is enabled.
Actual behavior
With Deck calendar/tasks integration enabled, Calendar delegation fails and the Calendar app displays:
Delegated calendars could not be loaded.
Make sure the server supports calendar delegation.
The server does support calendar delegation. The delegation itself is correctly stored in oc_dav_cal_proxy, and normal CalDAV requests work.
During the failing request, SabreDAV reports:
<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
<s:exception>Sabre\DAV\Exception\NotFound</s:exception>
<s:message>Node with name 'app-generated--deck--board-105' could not be found</s:message>
</d:error>
The referenced Deck board exists in oc_deck_boards, is active, and is not deleted or archived.
Other Deck-generated calendar nodes for the same environment can be accessed successfully.
As soon as Deck calendar/tasks integration is disabled for the affected user, calendar delegation works immediately. Re-enabling the integration reproduces the issue.
Calendar app version
6.5.3
CalDAV-clients used
No response
Browser
No response
Client operating system
No response
Server operating system
No response
Web server
None
Database engine version
None
PHP engine version
None
Nextcloud version
34.0.3
Updated from an older installed version or fresh install
None
List of activated apps
Nextcloud configuration
Web server error log
Log file
Browser log
Additional info
The troubleshooting and analysis of this issue was assisted by AI. All described behavior, reproduction steps, database queries, DAV responses, and test results were verified against the actual Nextcloud environment before submitting this issue.