[Bug]: Users management page crashes because window.OC.Notification is undefined

Look at UserList.vue around line 238 where window.OC.Notification.showTemporary is called. Check if window.OC.Notification is defined before using it, possibly adding a guard condition. Verify the fix by loading the users management page in a Nextcloud instance with encryption disabled and ensuring the user list appears without console errors.

⚠️ This issue respects the following points: ⚠️

• This is not a troubleshooting question, general support matter, or webserver/proxy problem, but likely a bug (if unsure, ask the Community Help Forum).
• This issue is not already reported on Github OR solved at the Community Help Forum (I've searched!).
• I'm using a maintained major version of Nextcloud Server and tested against the latest patch level. (Supported major versions and current patch levels).
• I agree to follow Nextcloud's Code of Conduct.
• I've tried my best to provide clear reproduction steps that someone unfamiliar with this bug could use to reproduce it.

Bug description

TITLE

[Bug]: Users management page crashes because window.OC.Notification is undefined

BUG DESCRIPTION

After upgrading from Nextcloud 34.0.3.2 to Nextcloud 35.0.0.10, the users management page no longer displays any user accounts. The page itself loads, including the sidebar, but the actual user list remains empty.

The accounts are still present and can be listed successfully using php occ user:list. There is no indication of lost or damaged user accounts.

The Firefox console shows that the users management frontend crashes in UserList.vue because window.OC.Notification is undefined:

TypeError: can't access property "showTemporary", window.OC.Notification is undefined
    setup UserList.vue:238

TypeError: can't access property "Fragment", n is undefined
    dr UserList.vue:1

The relevant code in the compiled users management JavaScript bundle calls:

window.OC.Notification.showTemporary(...)

The call is executed while trying to display this notification:

Password change is disabled because the master key is disabled

However, server-side encryption is disabled on this instance:

{
    "enabled": false,
    "defaultModule": "OC_DEFAULT_MODULE"
}

The application setting useMasterKey returns:

0

Therefore, the master-key notification also appears to be misleading in this configuration.

Disabling the Password Policy and Suspicious Login apps did not change the behavior.

A temporary local workaround that guards the notification call restores the complete users list immediately:

window.OC.Notification?.showTemporary?.(...)

This workaround was applied only after reproducing and documenting the original error. It is not intended as the proper upstream fix.

Steps to reproduce

STEPS TO REPRODUCE

1. Upgrade an existing Nextcloud installation from 34.0.3.2 to 35.0.0.10.
2. Use an instance where server-side encryption reports enabled: false and encryption useMasterKey is 0.
3. Log in as an administrator.
4. Open Administration settings.
5. Open the users/accounts management page.
6. Select “All accounts” or another account group.
7. Observe that the user list remains empty.
8. Open the browser console.
9. Observe the exception caused by window.OC.Notification.showTemporary() in UserList.vue.

Expected behavior

The users management page should display all existing user accounts.

A missing or unavailable notification API must not cause the complete users management component to crash.

If password changes are actually restricted, Nextcloud should display the warning using the currently supported notification API. If server-side encryption is disabled, it should not report that password changes are disabled because the master key is disabled.

Nextcloud Server version

35

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

MySQL

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

Upgraded to a MAJOR version (ex. 31 to 32)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud.digitalbuilders.eu"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/cloud.digitalbuilders.eu",
        "dbtype": "mysql",
        "version": "35.0.0.10",
        "installed": true,
        "default_phone_region": "DE",
        "encryption.legacy_format_support": false,
        "maintenance": false,
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "mysql.utf8mb4": true,
        "mail_smtpmode": "smtp",
        "mail_smtpauthtype": "LOGIN",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": true,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "theme": "",
        "loglevel": 2,
        "mail_sendmailmode": "smtp",
        "mail_smtpport": "465",
        "encryption.key_storage_migrated": false,
        "maintenance_window_start": 1,
        "filelocking.enabled": true,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379,
            "timeout": 0
        },
        "forbidden_filename_basenames": [
            "con",
            "prn",
            "aux",
            "nul",
            "com0",
            "com1",
            "com2",
            "com3",
            "com4",
            "com5",
            "com6",
            "com7",
            "com8",
            "com9",
            "com\u00b9",
            "com\u00b2",
            "com\u00b3",
            "lpt0",
            "lpt1",
            "lpt2",
            "lpt3",
            "lpt4",
            "lpt5",
            "lpt6",
            "lpt7",
            "lpt8",
            "lpt9",
            "lpt\u00b9",
            "lpt\u00b2",
            "lpt\u00b3"
        ],
        "forbidden_filename_characters": [
            "<",
            ">",
            ":",
            "\"",
            "|",
            "?",
            "*",
            "\\",
            "\/"
        ],
        "forbidden_filename_extensions": [
            " ",
            ".",
            ".filepart",
            ".part"
        ],
        "serverid": 1,
        "mail_smtpstreamoptions": {
            "ssl": {
                "allow_self_signed": false,
                "verify_peer": true,
                "verify_peer_name": true
            }
        },
        "app_install_overwrite": []
    }
}

List of activated Apps

Enabled:
  - activity: 8.0.0
  - admin_audit: 2.0.0-dev.0
  - announcementcenter: 7.5.0
  - appstore: 2.0.0-dev.0
  - calendar: 6.6.1
  - circles: 35.0.0
  - cloud_federation_api: 2.0.0-dev.0
  - collectives: 4.6.1
  - comments: 2.0.0-dev.0
  - contacts: 8.9.0
  - cospend: 4.1.3
  - dashboard: 8.0.0-dev.0
  - dav: 2.0.0-dev.1
  - deck: 1.19.0
  - encryption: 3.0.0-dev.0
  - event_update_notification: 2.10.0
  - federatedfilesharing: 2.0.0-dev.1
  - federation: 2.0.0-dev.0
  - files: 3.0.0-dev.0
  - files_automatedtagging: 6.0.0
  - files_downloadlimit: 5.3.0
  - files_lock: 35.0.0
  - files_pdfviewer: 8.0.0
  - files_reminders: 2.0.0-dev.0
  - files_retention: 6.0.0
  - files_sharing: 2.0.0-dev.1
  - files_trashbin: 2.0.0-dev.0
  - files_versions: 2.0.0-dev.0
  - fileslibreofficeedit: 2.0.1
  - firstrunwizard: 8.0.0
  - logreader: 8.0.0
  - lookup_server_connector: 2.0.0-dev.0
  - mail: 5.12.0
  - nextcloud_announcements: 7.0.0
  - notes: 6.1.0
  - notifications: 8.0.0
  - notify_push: 1.4.1
  - oauth2: 2.0.0-dev.0
  - office: 1.1.0
  - password_policy: 7.0.0
  - photos: 8.0.0
  - privacy: 7.0.0
  - profile: 2.0.0-dev.0
  - provisioning_api: 2.0.0-dev.0
  - registration: 3.1.0
  - richdocuments: 12.0.0
  - richdocumentscode: 26.4.303
  - settings: 2.0.0-dev.0
  - sharebymail: 2.0.0-dev.0
  - sharing: 1.0.4
  - spreed: 25.0.0
  - support: 7.0.0
  - survey_client: 7.0.0
  - suspicious_login: 13.0.0
  - tasks: 0.18.1
  - text: 9.0.0
  - theming: 3.0.0-dev.0
  - timemanager: 0.3.26
  - twofactor_backupcodes: 2.0.0-dev.0
  - twofactor_totp: 17.1.0
  - updatenotification: 2.0.0-dev.0
  - user_saml: 8.3.1
  - viewer: 8.0.0
  - webhook_listeners: 2.0.0-dev.0
  - welcome: 3.0.0
  - workflow_pdf_converter: 6.0.0
  - workflowengine: 3.0.0-dev.0
Disabled:
  - app_api: 35.0.0 (installed 34.0.0)
  - appointments: 2.7.4 (installed 2.7.4)
  - audioplayer: 3.9.0 (installed 3.9.0)
  - bookmarks: 16.2.6 (installed 16.2.6)
  - bruteforcesettings: 8.0.0 (installed 2.4.0)
  - contactsinteraction: 2.0.0-dev.0 (installed 1.5.0)
  - cpanelmailsync: 0.1.12 (installed 0.1.12)
  - documentserver_community: 0.4.0 (installed 0.2.4)
  - dropit: 0.4.0 (installed 0.4.0)
  - duplicatefinder: 1.8.1 (installed 1.8.1)
  - electronicsignatures: 3.0.12 (installed 3.0.12)
  - external: 9.0.1 (installed 9.0.1)
  - files_accesscontrol: 6.0.0 (installed 6.0.0)
  - files_bpm: 1.8.3 (installed 1.8.3)
  - files_ebookreader: 0.0.1 (installed 0.0.1)
  - files_external: 2.0.0-dev.0
  - files_texteditor: 2.15.1 (installed 2.15.1)
  - flow_notifications: 5.0.0 (installed 5.0.0)
  - folderplayer: 14.0.0 (installed 14.0.0)
  - groupfolders: 22.0.6 (installed 20.1.6)
  - impersonate: 5.0.0 (installed 5.0.0)
  - integration_discourse: 3.3.0 (installed 3.3.0)
  - integration_github: 3.2.7 (installed 3.2.7)
  - integration_gitlab: 5.0.0 (installed 5.0.0)
  - integration_mastodon: 5.2.0 (installed 5.2.0)
  - integration_reddit: 2.3.0 (installed 2.3.0)
  - integration_suitecrm: 3.2.3 (installed 3.2.3)
  - integration_twitter: 1.0.7 (installed 1.0.7)
  - ldap_contacts_backend: 1.14.0 (installed 1.14.0)
  - ldap_write_support: 1.16.0 (installed 1.16.0)
  - metadata: 0.24.0 (installed 0.23.0)
  - music: 3.1.1 (installed 3.1.1)
  - oidc_login: 3.3.4 (installed 3.3.4)
  - ojsxc: 5.0.0 (installed 4.3.1)
  - pax_fax: 1.2.3 (installed 1.2.3)
  - phonetrack: 1.3.3 (installed 1.3.3)
  - podcast: 0.3.1 (installed 0.3.1)
  - polls: 9.1.4 (installed 9.1.4)
  - quota_warning: 1.24.0 (installed 1.24.0)
  - radio: 1.0.3 (installed 1.0.3)
  - recognize: 13.1.0 (installed 13.1.0)
  - recommendations: 8.0.0 (installed 1.6.0)
  - related_resources: 6.0.0 (installed 1.2.0)
  - rocketchat_nextcloud: 0.9.6 (installed 0.9.6)
  - sendent: 4.4.0 (installed 4.4.0)
  - serverinfo: 7.0.0 (installed 1.14.0)
  - shifts: 1.9.11 (installed 1.9.11)
  - signlive: 0.9.9 (installed 0.9.9)
  - sip_trip_phone: 1.2.0 (installed 1.2.0)
  - socialsharing_diaspora: 4.1.0 (installed 4.1.0)
  - socialsharing_facebook: 4.1.0 (installed 4.1.0)
  - socialsharing_twitter: 4.1.0 (installed 4.1.0)
  - spgverein: 0.12.0 (installed 0.12.0)
  - systemtags: 2.0.0-dev.0 (installed 1.17.0)
  - talk_matterbridge: 1.34.1026000 (installed 1.34.1026000)
  - telephoneprovider: 1.0.3 (installed 1.0.3)
  - testing: 1.23.0
  - timetracker: 0.0.87 (installed 0.0.87)
  - twofactor_nextcloud_notification: 9.0.0
  - user_ldap: 2.0.0-dev.0 (installed 1.14.1)
  - user_oidc: 8.11.0 (installed 8.11.0)
  - user_status: 2.0.0-dev.0 (installed 1.4.0)
  - video_converter: 1.0.6 (installed 1.0.6)
  - weather_status: 2.0.0-dev.0 (installed 1.8.0)
  - whiteboard: 1.5.9 (installed 1.5.9)
  - workflow_media_converter: 3.2.2 (installed 3.2.1)

Nextcloud Signing status

Technical information
=====================
The following list covers which files have failed the integrity check. Please read
the previous linked documentation to learn more about the errors and how to fix
them.

Results
=======
- core
	- INVALID_HASH
		- .user.ini

Raw output
==========
Array
(
    [core] => Array
        (
            [INVALID_HASH] => Array
                (
                    [.user.ini] => Array
                        (
                            [expected] => 5cf34c20dbe0ddb9940eaeee08c1d9ac3a5f6cde8deac9dfb6ba5a1a2e40fda496f15f46e9d23250257bc6baa9a34f65113788afd335655beb4edb593ccd39d0
                            [current] => 43ebf893e1b6b765be22a82b86740404bac7bb08451e20b2b5c961561fc1d0d98a8dc605116b13bef352a0ae9438a8c3af84dfaeadea03a25d7dfa38543c89e2
                        )

                )

        )

)

Before applying the temporary workaround, the users management JavaScript file was unmodified.

The temporary workaround now intentionally modifies:

dist/settings-vue-settings-users-management.js

Therefore, an integrity warning for this file after applying the workaround is expected.

An unrelated pre-existing integrity warning for .user.ini was also present.

Nextcloud Logs

No corresponding server-side exception was found when reproducing the problem. The failure occurs in the browser frontend before the users list can be rendered.

Additional info

Client environment:

Windows 10
Firefox 156

The relevant section of the compiled JavaScript bundle contained exactly one occurrence of:

window.OC.Notification.showTemporary(

The following local change restored the users management page:

window.OC.Notification?.showTemporary?.(

This confirms that the unguarded access to window.OC.Notification causes the page to crash. The optional-chaining modification is only a local workaround and suppresses the notification if the legacy global API is unavailable.

A proper upstream fix may need to use the current Nextcloud notification API instead of the legacy window.OC.Notification global. The logic that sets canChangePassword should possibly also take into account that server-side encryption is disabled.

The second console error concerning Fragment appears after the notification exception and may be a consequential error.