[Bug]: This recurrence rule does not generate any valid instances Unable to create calendar object from subscription

⚠️ This issue respects the following points: ⚠️

[X] This is a bug, not a question or a configuration/webserver/proxy issue.
[X] This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
[X] Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
[X] I agree to follow Nextcloud's Code of Conduct.

Bug description

In one of my Google-calender subscriptions a appointment is causing this error, strangest is that the appointment IS in my calendar (perhaps an outdated, previous version of it)

Error generated in apps/dav/lib/CalDAV/WebcalCaching/RefreshWebcalService.php @ 131

Steps to reproduce

Wait for cron to reload subscriptions
See error appear

Expected behavior

No error about recurrence problems

Installation method

Official All-in-One appliance

Nextcloud Server version

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

PostgreSQL

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

[X] Default user-backend (database)
[ ] LDAP/ Active Directory
[ ] SSO - SAML
[ ] Other

Configuration report

{
    "system": {
        "one-click-instance": true,
        "one-click-instance.user-limit": 100,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "default_phone_region": "NL",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "check_data_directory_permissions": false,
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "overwritehost": "cloud.rikmeijer.nl",
        "overwriteprotocol": "https",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "cloud.rikmeijer.nl"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "29.0.4.1",
        "overwrite.cli.url": "https:\/\/cloud.rikmeijer.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***",
        "maintenance": false,
        "debug": false,
        "loglevel": "3",
        "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": [
            "OC\\Preview\\Imaginary",
            "OC\\Preview\\MarkDown",
            "OC\\Preview\\MP3",
            "OC\\Preview\\TXT",
            "OC\\Preview\\OpenDocument",
            "OC\\Preview\\Movie",
            "OC\\Preview\\Krita"
        ],
        "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.link": "https:\/\/nextcloud.com\/all-in-one\/",
        "upgrade.cli-upgrade-link": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/2726",
        "updatedirectory": "\/nc-updater",
        "davstorage.request_timeout": 3600,
        "htaccess.RewriteBase": "\/",
        "dbpersistent": false,
        "files_external_allow_create_new_local": true,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "twofactor_enforced": "true",
        "twofactor_enforced_groups": [
            "admin"
        ],
        "twofactor_enforced_excluded_groups": [
            "OpenProject"
        ],
        "appsallowlist": [],
        "allow_local_remote_servers": true,
        "updater.release.channel": "beta",
        "app_install_overwrite": [
            "nextcloud-aio",
            "printer",
            "talk_matterbridge"
        ],
        "maintenance_window_start": 100,
        "memories.exiftool": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/exiftool-aarch64-musl",
        "memories.vod.path": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/go-vod-aarch64",
        "memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
        "memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
        "preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
        "memories.db.triggers.fcu": true,
        "auth.bruteforce.protection.enabled": true,
        "ratelimit.protection.enabled": true,
        "memories.gis_type": 2
    }
}

List of activated Apps

Enabled:
  - activity: 2.21.1
  - admin_audit: 1.19.0
  - app_api: 3.1.0
  - bookmarks: 14.2.4
  - bruteforcesettings: 2.9.0
  - calendar: 4.7.15
  - 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
  - event_update_notification: 2.4.0
  - federatedfilesharing: 1.19.0
  - federation: 1.19.0
  - files: 2.1.0
  - files_downloadlimit: 2.0.0
  - files_external: 1.21.0
  - files_notify_redis: 0.3.4
  - files_pdfviewer: 2.10.0
  - files_reminders: 1.2.0
  - files_sharing: 1.21.0
  - files_trashbin: 1.19.0
  - files_versions: 1.22.0
  - firstrunwizard: 2.18.0
  - gpoddersync: 3.9.0
  - groupfolders: 17.0.2
  - integration_github: 2.0.7
  - integration_google: 3.0.2
  - integration_paperless: 1.0.3
  - logreader: 2.14.0
  - lookup_server_connector: 1.17.0
  - mail: 3.7.7
  - metadata: 0.20.0
  - news: 25.0.0-alpha8
  - nextcloud-aio: 0.6.0
  - nextcloud_announcements: 1.18.0
  - notes: 4.10.1
  - notifications: 2.17.0
  - notify_push: 0.7.0
  - oauth2: 1.17.0
  - oidc: 0.9.2
  - password_policy: 1.19.0
  - photos: 2.5.0
  - previewgenerator: 5.6.0
  - privacy: 1.13.0
  - provisioning_api: 1.19.0
  - recognize: 7.1.0
  - recommendations: 2.1.0
  - registration: 2.4.0
  - related_resources: 1.4.0
  - richdocuments: 8.4.4
  - serverinfo: 1.19.0
  - settings: 1.12.0
  - sharebymail: 1.19.0
  - sociallogin: 5.6.6
  - socialsharing_diaspora: 3.1.0
  - socialsharing_email: 3.1.0
  - socialsharing_twitter: 3.1.0
  - spreed: 19.0.7
  - support: 1.12.0
  - survey_client: 1.17.0
  - suspicious_login: 7.0.0
  - systemtags: 1.19.0
  - talk_matterbridge: 1.28.0-0
  - tasks: 0.16.1
  - text: 3.10.1
  - theming: 2.4.0
  - twofactor_admin: 4.5.0
  - twofactor_backupcodes: 1.18.0
  - twofactor_nextcloud_notification: 3.10.0
  - 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
  - workflowengine: 2.11.0
Disabled:
  - encryption: 2.17.0
  - user_ldap: 1.20.0

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"2z8n9cZ5co7s975yZwFM","level":3,"time":"2024-08-21T07:46:06+00:00","remoteAddr":"","user":"--","app":"dav","method":"","url":"--","message":"Unable to create calendar object from subscription 3"}

Additional info

Relevant ICS

BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 4.5.4//EN\r\nCALSCALE:GREGORIAN\r\nBEGIN:VTIMEZONE\r\nTZID:Europe/Paris\r\nX-LIC-LOCATION:Europe/Paris\r\nBEGIN:DAYLIGHT\r\nTZOFFSETFROM:+0100\r\nTZOFFSETTO:+0200\r\nTZNAME:GMT+2\r\nDTSTART:19700329T020000\r\nRRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU\r\nEND:DAYLIGHT\r\nBEGIN:STANDARD\r\nTZOFFSETFROM:+0200\r\nTZOFFSETTO:+0100\r\nTZNAME:GMT+1\r\nDTSTART:19701025T030000\r\nRRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU\r\nEND:STANDARD\r\nEND:VTIMEZONE\r\nBEGIN:VTIMEZONE\r\nTZID:Europe/Amsterdam\r\nX-LIC-LOCATION:Europe/Amsterdam\r\nBEGIN:DAYLIGHT\r\nTZOFFSETFROM:+0100\r\nTZOFFSETTO:+0200\r\nTZNAME:GMT+2\r\nDTSTART:19700329T020000\r\nRRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU\r\nEND:DAYLIGHT\r\nBEGIN:STANDARD\r\nTZOFFSETFROM:+0200\r\nTZOFFSETTO:+0100\r\nTZNAME:GMT+1\r\nDTSTART:19701025T030000\r\nRRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU\r\nEND:STANDARD\r\nEND:VTIMEZONE\r\nBEGIN:VTIMEZONE\r\nTZID:Europe/Brussels\r\nX-LIC-LOCATION:Europe/Brussels\r\nBEGIN:DAYLIGHT\r\nTZOFFSETFROM:+0100\r\nTZOFFSETTO:+0200\r\nTZNAME:GMT+2\r\nDTSTART:19700329T020000\r\nRRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU\r\nEND:DAYLIGHT\r\nBEGIN:STANDARD\r\nTZOFFSETFROM:+0200\r\nTZOFFSETTO:+0100\r\nTZNAME:GMT+1\r\nDTSTART:19701025T030000\r\nRRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU\r\nEND:STANDARD\r\nEND:VTIMEZONE\r\nBEGIN:VEVENT\r\nDTSTART;TZID=Europe/Brussels:20231229T130000\r\nDTEND;TZID=Europe/Brussels:20231229T133000\r\nRRULE:FREQ=WEEKLY;WKST=SU;UNTIL=20240111T225959Z;INTERVAL=2;BYDAY=FR\r\nEXDATE;TZID=Europe/Brussels:20231229T130000\r\nDTSTAMP:20240821T074537Z\r\nCENSOREDX-GOOGLE-CONFERENCE:https://meet.google.com/**CENSORED**\r\nCREATED:20230220T110458Z\r\nDESCRIPTION:Deelnemen via Google Meet: https://meet.google.com/**CENSORED**\r\n d\nOf bel: (NL) +31 20 257 3073 Pincode: CENSORED#\nMeer telefoonnummers:\r\n https://tel.meet/**CENSORED**?pin=**CENSORED**&hs=7\\n\\nGa voor meer info\r\n rmatie over Meet naar https://support.google.com/a/users/answer/9282720\r\nLAST-MODIFIED:20240816T133846Z\r\nSEQUENCE:3\r\nSTATUS:CONFIRMED\r\nSUMMARY:**CENSORED**\r\nTRANSP:OPAQUE\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n"},"id":"66c59b4330309"}

nextcloud / server