[Bug]: Invite guest by email doesn't work

[lumintulogic-admin]

⚠️ 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 OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

From files app, when i try to share a folder to guests using invite by email address, the form doesn't appear.

Steps to reproduce

1. Open files app
2. Click "sharing options" button next to a folder
3. In the internal shares input, paste an email address
4. When a dropdown appears, click invite guest
5. No form modal pops up

Expected behavior

Form modal pops up to complete the invitation details

Nextcloud Server version

33

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.4

Web server

Nginx

Database engine version

MariaDB

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

Updated from a MINOR version (ex. 32.0.1 to 32.0.2)

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***",
        "serverid": "CiHnx4Q3vnhS",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "192.168.18.9",
            "repository.lumintulogic.com"
        ],
        "default_phone_region": "ID",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "33.0.3.2",
        "overwrite.cli.url": "https:\/\/repository.lumintulogic.com",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": true,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "skeletondirectory": "",
        "auth.webauthn.enabled": false,
        "theme": "",
        "loglevel": 0,
        "ncd_yt_binary": "\/usr\/bin\/youtube-dl",
        "ncd_aria2_binary": "\/usr\/bin\/aria2c",
        "simpleSignUpLink.shown": false,
        "app_install_overwrite": {
            "0": "impersonate",
            "1": "spreed",
            "2": "registration",
            "3": "deck",
            "6": "metadata",
            "7": "recommendation_assistant"
        },
        "ncd_admin_settings": {
            "disallow_aria2_settings": "1",
            "ncd_yt_binary": "",
            "focusVisibleAdded": "",
            "ncd_disable_bt": "1"
        },
        "global_aria2_config": [],
        "enable_previews": true,
        "preview_max_x": 1000,
        "preview_max_y": 1000,
        "preview_max_memory": -1,
        "enabledPreviewProviders": [
            "OC\\Preview\\TXT",
            "OC\\Preview\\MarkDown",
            "OC\\Preview\\PDF",
            "OC\\Preview\\MSOfficeDoc",
            "OC\\Preview\\JPEG",
            "OC\\Preview\\PNG",
            "OC\\Preview\\GIF",
            "OC\\Preview\\BMP",
            "OC\\Preview\\XBitmap",
            "OC\\Preview\\MP3",
            "OC\\Preview\\HEIC",
            "OC\\Preview\\Movie",
            "OC\\Preview\\MKV",
            "OC\\Preview\\MP4",
            "OC\\Preview\\AVI",
            "OC\\Preview\\TIFF"
        ],
        "memories.exiftool": "\/var\/www\/html\/lumintul_repo\/apps\/memories\/bin-ext\/exiftool-amd64-glibc",
        "memories.vod.path": "\/var\/www\/html\/lumintul_repo\/apps\/memories\/bin-ext\/go-vod-amd64",
        "memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
        "memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
        "maintenance_window_start": 100,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "migrate_guest_user_data": true,
        "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"
        ],
        "memories.db.triggers.fcu": true,
        "twofactor_enforced": "true",
        "twofactor_enforced_groups": [
            "admin"
        ],
        "twofactor_enforced_excluded_groups": [],
        "mail_smtpstreamoptions": {
            "ssl": {
                "allow_self_signed": false,
                "verify_peer": true,
                "verify_peer_name": true
            }
        }
    }
}

List of activated Apps

Enabled:
  - activity: 6.0.0
  - admin_audit: 1.23.0
  - app_api: 33.0.0
  - approval: 3.3.0
  - assistant: 3.4.0
  - bruteforcesettings: 6.0.0
  - calendar: 6.2.3
  - calendar_resource_management: 0.11.0
  - circles: 33.0.0
  - cloud_federation_api: 1.17.0
  - collectives: 4.3.0
  - comments: 1.23.0
  - contacts: 8.4.5
  - contactsinteraction: 1.14.1
  - cospend: 4.0.0
  - dav: 1.36.0
  - deck: 1.17.1
  - event_update_notification: 2.8.0
  - external: 8.0.1
  - federatedfilesharing: 1.23.0
  - federation: 1.23.0
  - files: 2.5.0
  - files_downloadlimit: 5.1.0
  - files_external: 1.25.1
  - files_lock: 33.0.2
  - 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
  - files_zip: 2.3.0
  - firstrunwizard: 6.0.0
  - flow_notifications: 4.0.0
  - forms: 5.2.7
  - guests: 4.7.0
  - impersonate: 4.0.0
  - integration_google: 4.3.1
  - integration_openai: 4.3.1
  - logreader: 6.0.0
  - lookup_server_connector: 1.21.0
  - mail: 5.7.14
  - memories: 8.0.1
  - nextcloud_announcements: 5.0.0
  - notes: 5.0.0
  - notifications: 6.0.0
  - notify_push: 1.3.1
  - oauth2: 1.21.0
  - ocs_api_viewer: 1.0.11
  - oidc: 1.16.5
  - password_policy: 5.0.0
  - passwords: 2026.5.20
  - privacy: 5.0.0
  - profile: 1.2.0
  - provisioning_api: 1.23.0
  - recommendations: 6.0.0
  - registration: 2.9.0
  - related_resources: 4.0.0
  - richdocuments: 10.1.3
  - serverinfo: 5.0.0
  - settings: 1.16.0
  - sharebymail: 1.23.0
  - spreed: 23.0.4
  - support: 5.0.0
  - survey_client: 5.0.0
  - suspicious_login: 11.0.0
  - systemtags: 1.23.0
  - tables: 2.1.0
  - tasks: 0.17.1
  - text: 7.0.1
  - theming: 2.8.0
  - timemanager: 0.3.23
  - 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
  - whiteboard: 1.5.7
  - workflow_ocr: 1.33.1
  - workflowengine: 2.15.0
Disabled:
  - dashboard: 7.13.0 (installed 7.7.0)
  - encryption: 2.21.0
  - files_fulltextsearch: 33.0.0 (installed 33.0.0)
  - fulltextsearch: 33.0.0 (installed 33.0.0)
  - fulltextsearch_elasticsearch: 33.0.0 (installed 33.0.0)
  - metadata: 0.23.0 (installed 0.23.0)
  - photos: 6.0.0 (installed 2.5.0)
  - testing: 1.23.0
  - twofactor_nextcloud_notification: 7.0.0
  - user_ldap: 1.24.0

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

No relevant error

Additional info

Shared.Projects.-.Folder.tree.-.Files.-.LAKON.-.Google.Chrome.2026-05-05.12-33-52.mp4

[wycttt]

i have the same issue exactly as you, the guest APP updated to newest version then problem comes.

[wycttt]

i have the same issue exactly as you, the guest APP updated to newest version then problem comes.

I did 2 tests.
1, downgrade guests APP to 4.6, problem persist.
2, roll back nextcloud to 8.2 from 8.3 and downgrad guests APP to 4.6 from 4.7, all back to work.

SNAP version NextCloud.

Just for your reference :)

[lumintulogic-admin]

i have the same issue exactly as you, the guest APP updated to newest version then problem comes.

I did 2 tests. 1, downgrade guests APP to 4.6, problem persist. 2, roll back nextcloud to 8.2 from 8.3 and downgrad guests APP to 4.6 from 4.7, all back to work.

SNAP version NextCloud.

Just for your reference :)

I'm not familiar with NC versioning for SNAP. Which NC vesion are you on now?