Inviting Teams/Circles results in the wrong user count and a error log stating Could not find organizer

Steps to reproduce

1. Create a Team/Circle with myself and a guest email address
2. When creating a new appointment, add the created Team
3. The user count will say 12 members in the Team when there are only 2

Expected behavior

1. The correct count of Team/Circle members is stated
2. The members get added correctly to the appointment invite

Actual behaviour

1. A popup appears: Note that members of circles get invited but are not synced yet.
2. No members show up in the appointment invite
3. The Nextcloud log shows the error pasted below
4. The browser console shows an error pasted below as well

Calendar app version

4.7.8 and 4.7.9 and maybe more versions

CalDAV-clients used

n/a

Browser

Chrome Version 126.0.6478.126 (Official Build) (64-bit) but others as well

Client operating system

Fedora 40

Server operating system

Debian 12, using docker with Nextcloud-AIO

Web server

Apache

Database engine version

PostgreSQL

PHP engine version

PHP 8.2

Nextcloud version

Nextcloud Hub 8 (29.0.3)

Updated from an older installed version or fresh install

Updated from an older version

List of activated apps

Enabled:
  - activity: 2.21.1
  - admin_audit: 1.19.0
  - app_api: 2.7.0
  - assistant: 1.1.0
  - bruteforcesettings: 2.9.0
  - calendar: 4.7.9
  - call_summary_bot: 1.1.1
  - camerarawpreviews: 0.8.5
  - circles: 29.0.0-dev
  - cloud_federation_api: 1.12.0
  - comments: 1.19.0
  - contacts: 6.0.0
  - contactsinteraction: 1.10.0
  - dashboard: 7.9.0
  - dav: 1.30.1
  - deck: 1.13.1
  - federatedfilesharing: 1.19.0
  - federation: 1.19.0
  - files: 2.1.0
  - files_antivirus: 5.5.6
  - files_downloadlimit: 2.0.0
  - files_external: 1.21.0
  - files_fulltextsearch: 29.0.0
  - files_pdfviewer: 2.10.0
  - files_reminders: 1.2.0
  - files_retention: 1.18.0
  - files_sharing: 1.21.0
  - files_trashbin: 1.19.0
  - files_versions: 1.22.0
  - fileslibreofficeedit: 1.1.0
  - firstrunwizard: 2.18.0
  - flow_notifications: 1.9.0
  - forms: 4.2.4
  - fulltextsearch: 29.0.0
  - fulltextsearch_elasticsearch: 29.0.1
  - groupfolders: 17.0.1
  - impersonate: 1.16.0
  - integration_giphy: 1.0.10
  - integration_google: 2.2.0
  - integration_openai: 2.0.3
  - integration_youtube: 0.2.1
  - logreader: 2.14.0
  - lookup_server_connector: 1.17.0
  - mail: 3.7.2
  - maps: 1.4.0
  - memegen: 1.0.8
  - memories: 7.3.1
  - nextcloud-aio: 0.6.0
  - nextcloud_announcements: 1.18.0
  - notes: 4.10.0
  - notifications: 2.17.0
  - notify_push: 0.6.12
  - oauth2: 1.17.0
  - oidc: 0.9.1
  - password_policy: 1.19.0
  - photos: 2.5.0
  - previewgenerator: 5.5.0
  - privacy: 1.13.0
  - provisioning_api: 1.19.0
  - recognize: 7.0.0
  - recommendations: 2.1.0
  - related_resources: 1.4.0
  - richdocuments: 8.4.3
  - serverinfo: 1.19.0
  - settings: 1.12.0
  - sharebymail: 1.19.0
  - sociallogin: 5.6.5
  - socialsharing_email: 3.1.0
  - spreed: 19.0.4
  - stt_helper: 1.1.1
  - support: 1.12.0
  - survey_client: 1.17.0
  - suspicious_login: 7.0.0
  - systemtags: 1.19.0
  - tables: 0.7.3
  - tasks: 0.16.0
  - text: 3.10.1
  - theming: 2.4.0
  - twofactor_backupcodes: 1.18.0
  - twofactor_totp: 11.0.0-dev
  - twofactor_webauthn: 1.4.0
  - user_status: 1.9.0
  - viewer: 2.3.0
  - weather_status: 1.9.0
  - workflow_ocr: 1.29.0
  - workflowengine: 2.11.0
Disabled:
  - encryption: 2.17.0
  - updatenotification: 1.19.1 (installed 1.16.0)
  - user_ldap: 1.20.0

Nextcloud configuration

{
    "system": {
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "overwritehost": "cloud.maas-opleidingen.nl",
        "overwriteprotocol": "https",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "cloud.maas-opleidingen.nl"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "29.0.3.4",
        "overwrite.cli.url": "https:\/\/cloud.maas-opleidingen.nl\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "loglevel": 2,
        "log_type": "file",
        "logfile": "\/var\/www\/html\/data\/nextcloud.log",
        "log_rotate_size": "10485760",
        "log.condition": {
            "apps": [
                "admin_audit"
            ]
        },
        "preview_max_x": 2048,
        "preview_max_y": 2048,
        "jpeg_quality": 60,
        "enabledPreviewProviders": {
            "1": "OC\\Preview\\Image",
            "2": "OC\\Preview\\MarkDown",
            "3": "OC\\Preview\\MP3",
            "4": "OC\\Preview\\TXT",
            "5": "OC\\Preview\\OpenDocument",
            "6": "OC\\Preview\\Movie",
            "0": "OC\\Preview\\Imaginary"
        },
        "enable_previews": true,
        "upgrade.disable-web": true,
        "mail_smtpmode": "smtp",
        "trashbin_retention_obligation": "auto, 30",
        "versions_retention_obligation": "auto, 30",
        "activity_expire_days": "30",
        "simpleSignUpLink.shown": false,
        "share_folder": "\/Shared",
        "one-click-instance": true,
        "one-click-instance.user-limit": 100,
        "one-click-instance.link": "https:\/\/nextcloud.com\/all-in-one\/",
        "htaccess.RewriteBase": "\/",
        "files_external_allow_create_new_local": false,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "allow_local_remote_servers": true,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "default_phone_region": "NL",
        "maintenance": false,
        "preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
        "memories.exiftool": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/exiftool-amd64-musl",
        "memories.qsv": true,
        "memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
        "memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
        "memories.vod.path": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/go-vod-amd64",
        "memories.vod.disable": false,
        "memories.vod.vaapi": true,
        "memories.vod.nvenc": false,
        "memories.vod.nvenc.scale": "npp",
        "memories.vod.nvenc.temporal_aq": true,
        "updatedirectory": "\/nc-updater",
        "updater.release.channel": "beta",
        "upgrade.cli-upgrade-link": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/2726",
        "davstorage.request_timeout": 3600,
        "dbpersistent": false,
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "appsallowlist": false,
        "maintenance_window_start": 100,
        "preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
        "memories.db.triggers.fcu": true,
        "auth.bruteforce.protection.enabled": true,
        "ratelimit.protection.enabled": true,
        "memories.gis_type": 2
    }
}

Web server error log

{"reqId":"ojIW7Ec8griOEmSYIJhs","level":3,"time":"2024-06-21T19:04:21+00:00","remoteAddr":"192.168.112.1","user":"rutger.putter","app":"index","method":"GET","url":"/index.php/apps/calendar/v1/circles/getmembers?format=json&circleId=FaWg5nkVLV3pqGTgmbESjn7DQYRwMDa","message":"Could not find organizer","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36","version":"29.0.3.3","exception":{"Exception":"OCA\\Calendar\\Service\\ServiceException","Message":"Could not find organizer","Code":0,"Trace":[{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":232,"function":"getCircleMembers","class":"OCA\\Calendar\\Controller\\ContactController","type":"->","args":["FaWg5nkVLV3pqGTgmbESjn7DQYRwMDa"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":138,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[["OCA\\Calendar\\Controller\\ContactController"],"getCircleMembers"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":184,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[["OCA\\Calendar\\Controller\\ContactController"],"getCircleMembers"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":338,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Calendar\\Controller\\ContactController","getCircleMembers",["OC\\AppFramework\\DependencyInjection\\DIContainer"],["calendar.contact.getcirclemembers"]]},{"file":"/var/www/html/lib/base.php","line":1050,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/calendar/v1/circles/getmembers"]},{"file":"/var/www/html/index.php","line":49,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/custom_apps/calendar/lib/Controller/ContactController.php","Line":233,"message":"Could not find organizer","exception":{},"CustomMessage":"Could not find organizer"}}

Log file

No response

Browser log

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'forEach')
    at o.resolveCircleMembers (InviteesListSearch.vue:197:1)

circleService.js:84 
             
       GET https://<URL>/index.php/apps/calendar/v1/circles/getmembers?format=json&circleId=lpB2DM1ymQ82w2nVZjB4cnEWA12LcWq 500 (Internal Server Error)

Additional info

No response

Reproduce the Team/Circle invitation flow, then inspect custom_apps/calendar/lib/Controller/ContactController.php around line 233 and the getmembers request in circleService.js. Trace how InviteesListSearch.vue around line 197 handles the response; done means the correct member count appears, members are added to the appointment invite, and the request no longer produces the reported error.