NotFound Node with name 'xyz' could not be found

I get this error message in the logs for different values of ‘xyz’.

What have I done wrong, thanks for any help

If it helps:
NotFound
Node with name ‘Fj5snXGWgq5GY6m2’ could not be found
/www/htdocs/w01d4c92/cloud.domain.tld/apps/dav/lib/CalDAV/PublicCalendarRoot.php
Zeile 73
OCA\DAV\CalDAV\CalDavBackend->getPublicCalendar(
“Fj5snXGWgq5GY6m2”
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/dav/lib/DAV/Tree.php
Zeile 95
OCA\DAV\CalDAV\PublicCalendarRoot->getChild(
“Fj5snXGWgq5GY6m2”
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/dav/lib/DAV/Server.php
Zeile 971
Sabre\DAV\Tree->getNodeForPath(
“public-calendars/Fj5snXGWgq5GY6m2”
)
Sabre\DAV\Server->getPropertiesIteratorForPath(
“public-calendars/Fj5snXGWgq5GY6m2”,
[
“{DAV:}resourcetype”,
“{DAV:}displayname”,
“{http://sabredav.org/ns}sync-token”,
“{DAV:}sync-token”,
“{http://apple.com/ns/ical/}calendar-color”
],
0
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/dav/lib/DAV/Server.php
Zeile 941
undefinedundefinediterator_to_array(
[
“Generator”
]
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/dav/lib/DAV/Server.php
Zeile 800
Sabre\DAV\Server->getPropertiesForPath(
“public-calendars/Fj5snXGWgq5GY6m2”,
[
“{DAV:}resourcetype”,
“{DAV:}displayname”,
“{http://sabredav.org/ns}sync-token”,
“{DAV:}sync-token”,
“{http://apple.com/ns/ical/}calendar-color”
],
0
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/dav/lib/CalDAV/ICSExportPlugin.php
Zeile 92
Sabre\DAV\Server->getProperties(
“public-calendars/Fj5snXGWgq5GY6m2”,
[
“{DAV:}resourcetype”,
“{DAV:}displayname”,
“{http://sabredav.org/ns}sync-token”,
“{DAV:}sync-token”,
“{http://apple.com/ns/ical/}calendar-color”
]
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/event/lib/WildcardEmitterTrait.php
Zeile 89
Sabre\CalDAV\ICSExportPlugin->httpGet(
[
“Sabre\HTTP\Request”
],
[
“Sabre\HTTP\Response”
]
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/dav/lib/DAV/Server.php
Zeile 472
Sabre\DAV\Server->emit(
“method:GET”,
[
[
“Sabre\HTTP\Request”
],
[
“Sabre\HTTP\Response”
]
]
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/dav/lib/DAV/Server.php
Zeile 253
Sabre\DAV\Server->invokeMethod(
[
“Sabre\HTTP\Request”
],
[
“Sabre\HTTP\Response”
]
)
/www/htdocs/w01d4c92/cloud.domain.tld/3rdparty/sabre/dav/lib/DAV/Server.php
Zeile 321
Sabre\DAV\Server->start()
/www/htdocs/w01d4c92/cloud.domain.tld/apps/dav/lib/Server.php
Zeile 373
Sabre\DAV\Server->exec()
/www/htdocs/w01d4c92/cloud.domain.tld/apps/dav/appinfo/v2/remote.php
Zeile 35
OCA\DAV\Server->exec()
/www/htdocs/w01d4c92/cloud.domain.tld/remote.php
Zeile 172
undefinedundefinedrequire_once(
“/www/htdocs/w01d4c92/cloud.domain.tld/apps/dav/appinfo/v2/remote.php”
)

Well it’s hard to read since you didn’t mark the stack trace as preformatted in the editor, but this looks like CalDAV and having to do with some public calendar. Does that ring a bell?