RemoteNotFoundException when adding trusted federated user to team

[Tachi107]

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Steps to reproduce

1. Add a Nextcloud instance as trusted for federation under /settings/admin/sharing → Trusted servers and wait a couple of hours/days for it to take effect
2. Add a remote user in the Contacts app to a team

Expected behaviour

The user should get added

Actual behaviour

The user gets found, but clicking "Add to TeamName" leads to a generic "Some members could not be added" error, as shown in the screenshot.

In the logs, two event get logged, added in the details element.

Details

{"reqId":"agdJO7rt_wxw0HpBYPAWRAAAAAU","level":3,"time":"2026-05-15T16:26:35+00:00","remoteAddr":"193.205.210.82","user":"admin","app":"","method":"POST","url":"/ocs/v2.php/apps/circles/circles/uqNYb1Qcqz1lvPvjAbNF4qFNx2Ciw4F/members/multi","scriptName":"/ocs/v2.php","message":"{\"event\":\"\"}","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0","version":"33.0.3.2","exception":{"Exception":"OCA\\Circles\\Exceptions\\RemoteNotFoundException","Message":"Unknown remote instance","Code":404,"Trace":[{"file":"/var/www/nextcloud/apps/circles/lib/Db/RemoteRequest.php","line":207,"function":"getItemFromRequest","class":"OCA\\Circles\\Db\\RemoteRequestBuilder","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/RemoteStreamService.php","line":313,"function":"getFromInstance","class":"OCA\\Circles\\Db\\RemoteRequest","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/RemoteStreamService.php","line":292,"function":"getCachedRemoteInstance","class":"OCA\\Circles\\Service\\RemoteStreamService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/RemoteStreamService.php","line":254,"function":"getRemoteInstanceEntry","class":"OCA\\Circles\\Service\\RemoteStreamService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/RemoteStreamService.php","line":210,"function":"requestRemoteInstance","class":"OCA\\Circles\\Service\\RemoteStreamService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/RemoteService.php","line":374,"function":"resultRequestRemoteInstance","class":"OCA\\Circles\\Service\\RemoteStreamService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/FederatedUserService.php","line":884,"function":"getFederatedUserFromInstance","class":"OCA\\Circles\\Service\\RemoteService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/FederatedUserService.php","line":773,"function":"getFederatedUser_User","class":"OCA\\Circles\\Service\\FederatedUserService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/FederatedItems/SingleMemberAdd.php","line":190,"function":"getFederatedUser","class":"OCA\\Circles\\Service\\FederatedUserService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/FederatedItems/MassiveMemberAdd.php","line":51,"function":"generateMember","class":"OCA\\Circles\\FederatedItems\\SingleMemberAdd","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/FederatedEventService.php","line":116,"function":"verify","class":"OCA\\Circles\\FederatedItems\\MassiveMemberAdd","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/MemberService.php","line":266,"function":"newEvent","class":"OCA\\Circles\\Service\\FederatedEventService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Controller/LocalController.php","line":277,"function":"addMembers","class":"OCA\\Circles\\Service\\MemberService","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":205,"function":"membersAdd","class":"OCA\\Circles\\Controller\\LocalController","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/ocs/v1.php","line":61,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/ocs/v2.php","line":8,"args":["/var/www/nextcloud/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/nextcloud/apps/circles/lib/Db/RemoteRequestBuilder.php","Line":87,"message":"{\"event\":\"\"}","exception":"{\"class\":\"OCA\\Circles\\Exceptions\\RemoteNotFoundException\",\"message\":\"Unknown remote instance\",\"code\":404,\"file\":\"/var/www/nextcloud/apps/circles/lib/Db/RemoteRequestBuilder.php:87\",\"trace\":\"#0 /var/www/nextcloud/apps/circles/lib/Db/RemoteRequest.php(207): OCA\\Circles\\Db\\RemoteRequestBuilder->getItemFromRequest()\\n#1 /var/www/nextcloud/apps/circles/lib/Service/RemoteStreamService.php(313): OCA\\Circles\\Db\\RemoteRequest->getFromInstance()\\n#2 /var/www/nextcloud/apps/circles/lib/Service/RemoteStreamService.php(292): OCA\\Circles\\Service\\RemoteStreamService->getCachedRemoteInstance()\\n#3 /var/www/nextcloud/apps/circles/lib/Service/RemoteStreamService.php(254): OCA\\Circles\\Service\\RemoteStreamService->getRemoteInstanceEntry()\\n#4 /var/www/nextcloud/apps/circles/lib/Service/RemoteStreamService.php(210): OCA\\Circles\\Service\\RemoteStreamService->requestRemoteInstance()\\n#5 /var/www/nextcloud/apps/circles/lib/Service/RemoteService.php(374): OCA\\Circles\\Service\\RemoteStreamService->resultRequestRemoteInstance()\\n#6 /var/www/nextcloud/apps/circles/lib/Service/FederatedUserService.php(884): OCA\\Circles\\Service\\RemoteService->getFederatedUserFromInstance()\\n#7 /var/www/nextcloud/apps/circles/lib/Service/FederatedUserService.php(773): OCA\\Circles\\Service\\FederatedUserService->getFederatedUser_User()\\n#8 /var/www/nextcloud/apps/circles/lib/FederatedItems/SingleMemberAdd.php(190): OCA\\Circles\\Service\\FederatedUserService->getFederatedUser()\\n#9 /var/www/nextcloud/apps/circles/lib/FederatedItems/MassiveMemberAdd.php(51): OCA\\Circles\\FederatedItems\\SingleMemberAdd->generateMember()\\n#10 /var/www/nextcloud/apps/circles/lib/Service/FederatedEventService.php(116): OCA\\Circles\\FederatedItems\\MassiveMemberAdd->verify()\\n#11 /var/www/nextcloud/apps/circles/lib/Service/MemberService.php(266): OCA\\Circles\\Service\\FederatedEventService->newEvent()\\n#12 /var/www/nextcloud/apps/circles/lib/Controller/LocalController.php(277): OCA\\Circles\\Service\\MemberService->addMembers()\\n#13 /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(205): OCA\\Circles\\Controller\\LocalController->membersAdd()\\n#14 /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(118): OC\\AppFramework\\Http\\Dispatcher->executeController()\\n#15 /var/www/nextcloud/lib/private/AppFramework/App.php(153): OC\\AppFramework\\Http\\Dispatcher->dispatch()\\n#16 /var/www/nextcloud/lib/private/Route/Router.php(321): OC\\AppFramework\\App::main()\\n#17 /var/www/nextcloud/ocs/v1.php(61): OC\\Route\\Router->match()\\n#18 /var/www/nextcloud/ocs/v2.php(8): require_once('...')\\n#19 {main}\"}","CustomMessage":"{\"event\":\"\"}"},"id":"6a0749b1ab4fe"}

{"reqId":"agdJO7rt_wxw0HpBYPAWRAAAAAU","level":3,"time":"2026-05-15T16:26:35+00:00","remoteAddr":"193.205.210.82","user":"admin","app":"","method":"POST","url":"/ocs/v2.php/apps/circles/circles/uqNYb1Qcqz1lvPvjAbNF4qFNx2Ciw4F/members/multi","scriptName":"/ocs/v2.php","message":"Exception thrown: OCA\\Circles\\Tools\\Exceptions\\RequestNetworkException","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0","version":"33.0.3.2","exception":{"Exception":"OCA\\Circles\\Tools\\Exceptions\\RequestNetworkException","Message":"","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/circles/lib/Service/FederatedEventService.php","line":397,"function":"doRequest","class":"OCA\\Circles\\Service\\FederatedEventService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/FederatedEventService.php","line":126,"function":"initBroadcast","class":"OCA\\Circles\\Service\\FederatedEventService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Service/MemberService.php","line":266,"function":"newEvent","class":"OCA\\Circles\\Service\\FederatedEventService","type":"->"},{"file":"/var/www/nextcloud/apps/circles/lib/Controller/LocalController.php","line":277,"function":"addMembers","class":"OCA\\Circles\\Service\\MemberService","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":205,"function":"membersAdd","class":"OCA\\Circles\\Controller\\LocalController","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/ocs/v1.php","line":61,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/ocs/v2.php","line":8,"args":["/var/www/nextcloud/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/nextcloud/apps/circles/lib/Tools/Traits/TNCRequest.php","Line":80,"message":"","exception":"{\"class\":\"OCA\\Circles\\Tools\\Exceptions\\RequestNetworkException\",\"message\":\"\",\"code\":0,\"file\":\"/var/www/nextcloud/apps/circles/lib/Tools/Traits/TNCRequest.php:80\",\"trace\":\"#0 /var/www/nextcloud/apps/circles/lib/Service/FederatedEventService.php(397): OCA\\Circles\\Service\\FederatedEventService->doRequest()\\n#1 /var/www/nextcloud/apps/circles/lib/Service/FederatedEventService.php(126): OCA\\Circles\\Service\\FederatedEventService->initBroadcast()\\n#2 /var/www/nextcloud/apps/circles/lib/Service/MemberService.php(266): OCA\\Circles\\Service\\FederatedEventService->newEvent()\\n#3 /var/www/nextcloud/apps/circles/lib/Controller/LocalController.php(277): OCA\\Circles\\Service\\MemberService->addMembers()\\n#4 /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(205): OCA\\Circles\\Controller\\LocalController->membersAdd()\\n#5 /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(118): OC\\AppFramework\\Http\\Dispatcher->executeController()\\n#6 /var/www/nextcloud/lib/private/AppFramework/App.php(153): OC\\AppFramework\\Http\\Dispatcher->dispatch()\\n#7 /var/www/nextcloud/lib/private/Route/Router.php(321): OC\\AppFramework\\App::main()\\n#8 /var/www/nextcloud/ocs/v1.php(61): OC\\Route\\Router->match()\\n#9 /var/www/nextcloud/ocs/v2.php(8): require_once('...')\\n#10 {main}\"}","CustomMessage":"Exception thrown: OCA\\Circles\\Tools\\Exceptions\\RequestNetworkException"},"id":"6a0749b1ab4a2"}

Server configuration

Web server: Apache

Database: MariaDB 10.11.14

PHP version: 8.2.31

Nextcloud version: 33.0.3

List of activated apps

Enabled:
  - activity: 6.0.0
  - bruteforcesettings: 6.0.0
  - calendar: 6.2.3
  - circles: 33.0.0
  - cloud_federation_api: 1.17.0
  - comments: 1.23.0
  - contacts: 8.4.5
  - contactsinteraction: 1.14.1
  - dashboard: 7.13.0
  - dav: 1.36.0
  - end_to_end_encryption: 2.1.0
  - federatedfilesharing: 1.23.0
  - federation: 1.23.0
  - files: 2.5.0
  - files_downloadlimit: 5.1.0
  - files_pdfviewer: 6.0.0
  - files_reminders: 1.6.0
  - files_sharing: 1.25.2
  - files_trashbin: 1.23.0
  - files_versions: 1.26.0
  - firstrunwizard: 6.0.0
  - logreader: 6.0.0
  - lookup_server_connector: 1.21.0
  - news: 28.3.0
  - nextcloud_announcements: 5.0.0
  - notes: 5.0.0
  - notifications: 6.0.0
  - oauth2: 1.21.0
  - password_policy: 5.0.0
  - photos: 6.0.0
  - privacy: 5.0.0
  - profile: 1.2.0
  - provisioning_api: 1.23.0
  - recommendations: 6.0.0
  - related_resources: 4.0.0
  - richdocuments: 10.1.3
  - serverinfo: 5.0.0
  - settings: 1.16.0
  - sharebymail: 1.23.0
  - support: 5.0.0
  - survey_client: 5.0.0
  - systemtags: 1.23.0
  - text: 7.0.1
  - theming: 2.8.0
  - twofactor_backupcodes: 1.22.0
  - twofactor_totp: 15.0.0
  - updatenotification: 1.23.0
  - user_status: 1.13.0
  - viewer: 6.0.0
  - weather_status: 1.13.0
  - webhook_listeners: 1.5.0
  - workflowengine: 2.15.0
Disabled:
  - admin_audit: 1.23.0
  - app_api: 33.0.0 (installed 33.0.0)
  - encryption: 2.21.0
  - files_external: 1.25.1
  - suspicious_login: 11.0.0
  - testing: 1.23.0
  - twofactor_nextcloud_notification: 7.0.0
  - user_ldap: 1.24.0

Nextcloud configuration

{
    "system": {
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "nextcloud.hackinpovo.it"
        ],
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "33.0.3.2",
        "overwrite.cli.url": "https:\/\/nextcloud.hackinpovo.it",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0
        },
        "filelocking.enabled": true,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "log_type": "file",
        "logfile": "\/var\/www\/nextcloud-data\/nextcloud.log",
        "loglevel": 3,
        "maintenance": false,
        "theme": "",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpauth": true,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "app_install_overwrite": [],
        "data-fingerprint": "8fa8361538dae73114a7e09b52599e41"
    }
}