Error in Nextcloud log after upgrading to 28.0.1

[severalthings]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github (I've searched it).
• I agree to follow Nextcloud's Code of Conduct.

What went wrong, what did you observe?

This is from the nextcloud log after upgrading to 28.0.1
Fehler index
Exception strtoupper(): Argument #1 ($string) must be of type string, Sabre\VObject\Parameter given in file '/www/htdocs/w00f893b/cloud.adfc-leipzig.de/cloud/apps/polls/lib/Model/CalendarEvent.php' line 116

What did you expect, how polls should behave instead?

No error in nextcloud log

What steps does it need to replay this bug?

Opening an existing poll.

Installation method

Installed/updated from the appstore (Apps section of your site)

Installation type

Updated from previous major version (i.e. 3.x.x to 4.x.x)

Affected polls version

No response

Which browser did you use, when experiencing the bug?

• Firefox
• Chrome
• Chromium/Chromium based (i.e. Edge)
• Safari
• Other/Don't know

Other browser

No response

Add your browser log here

No response

Additional client environment information

.

NC version

Other/Don't know

Other Nextcloud version

Nextcloud 28.0.1

PHP engine version

PHP 8.1

Other PHP version

No response

Database engine

MariaDB

Database Engine version or other Database

10.6

Which user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other/Don't know

Add your nextcloud server log here

Fehler	index	
Exception strtoupper(): Argument #1 ($string) must be of type string, Sabre\VObject\Parameter given in file '/www/htdocs/w00f893b/cloud.adfc-leipzig.de/cloud/apps/polls/lib/Model/CalendarEvent.php' line 116

Additional environment informations

,

Configuration report

config:list system
The current PHP memory limit is below the recommended value of 512MB.
{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud.adfc-leipzig.de"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "28.0.1.1",
        "overwrite.cli.url": "http:\/\/cloud.adfc-leipzig.de\/cloud",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "wkcIg_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "pipe",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "mail_smtpsecure": "tls",
        "minimum.supported.desktop.version": "2.5.1",
        "loglevel": 2,
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpauth": 1,
        "mail_smtpport": "25",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "default_language": "de",
        "default_locale": "de_DE",
        "default_phone_region": "DD",
        "tempdirectory": "\/www\/htdocs\/w00f893b\/cloud.adfc-leipzig.de\/cloud\/tmp",
        "updater.release.channel": "stable",
        "app_install_overwrite": [
            "spgverein"
        ],
        "trashbin_retention_obligation": "auto,120",
        "version_retention_obligation": "auto,90",
        "theme": "",
        "updater.secret": "***REMOVED SENSITIVE VALUE***"
    }
}

List of activated Apps

ssh-w00f893b@dd17524:/www/htdocs/w00f893b/cloud.adfc-leipzig.de/cloud$ php81 occ app:list
The current PHP memory limit is below the recommended value of 512MB.
Enabled:
  - activity: 2.20.0
  - admin_audit: 1.18.0
  - calendar: 4.6.3
  - circles: 28.0.0-dev
  - cloud_federation_api: 1.11.0
  - comments: 1.18.0
  - contacts: 5.5.1
  - contactsinteraction: 1.9.0
  - dashboard: 7.8.0
  - dav: 1.29.1
  - federatedfilesharing: 1.18.0
  - federation: 1.18.0
  - files: 2.0.0
  - files_external: 1.20.0
  - files_pdfviewer: 2.9.0
  - files_reminders: 1.1.0
  - files_sharing: 1.20.0
  - files_trashbin: 1.18.0
  - files_versions: 1.21.0
  - firstrunwizard: 2.17.0
  - logreader: 2.13.0
  - lookup_server_connector: 1.16.0
  - nextcloud_announcements: 1.17.0
  - notifications: 2.16.0
  - oauth2: 1.16.3
  - password_policy: 1.18.0
  - photos: 2.4.0
  - polls: 6.0.1
  - privacy: 1.12.0
  - provisioning_api: 1.18.0
  - quota_warning: 1.18.0
  - recommendations: 2.0.0
  - related_resources: 1.3.0
  - serverinfo: 1.18.0
  - settings: 1.10.1
  - sharebymail: 1.18.0
  - spreed: 18.0.1
  - support: 1.11.0
  - survey_client: 1.16.0
  - systemtags: 1.18.0
  - text: 3.9.1
  - theming: 2.3.0
  - twofactor_backupcodes: 1.17.0
  - updatenotification: 1.18.0
  - user_status: 1.8.1
  - viewer: 2.2.0
  - workflowengine: 2.10.0
Disabled:
  - bruteforcesettings: 2.8.0 (installed 2.0.1)
  - deck: 1.12.0 (installed 1.12.0)
  - encryption: 2.16.0
  - files_rightclick: 0.15.1 (installed 1.6.0)
  - suspicious_login: 6.0.0
  - twofactor_totp: 10.0.0-beta.2
  - user_ldap: 1.19.0
  - weather_status: 1.8.0 (installed 1.2.0)

Nextcloud Signing status

No errors have been found.

Additional Information

.

[dartcafe]

Confirmation. I can reproce that. I have to understand, what changed in the calendar API.

Disable the calendar check meanwhile.

[dartcafe]

Please do not post screenshots, but error logs from the console and/or server.log.

From what I recognize, your issue is handeld here and is fixed.

[github-actions]

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