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Screenshots not available in App Store in Nextcloud Instance #65761

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Bug
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Screenshots not available in App Store in Nextcloud Instance#65761
Bug
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0. Needs triagePending check for reproducibility or if it fits our roadmap35-feedbackbugteam: FilesCode maintained by 📁 Files team

Description

@chenasraf
chenasraf
opened on Oct 19, 2026

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Steps to reproduce

  1. Enter Nextcloud instance's App Store
  2. Look at any app
  3. No screenshots

Expected behaviour

Screenshots should be visible on instance

Actual behaviour

Most screenshots are entirely missing, some report file size too large and show an error-like image. They're still visible in App Store website.

Screenshots

Image Image Image

Server configuration

Web server: Apache

Database: PostgreSQL

PHP version: 8.4.26

Nextcloud version: 35.0.2

List of activated apps 
Enabled:
  - activity: 8.0.0
  - admin_audit: 2.0.0
  - app_api: 35.0.0
  - appstore: 2.0.0
  - assistant: 4.0.0
  - autocurrency: 1.9.0
  - bookmarks: 17.0.0
  - bruteforcesettings: 8.0.0
  - calendar: 6.6.2
  - circles: 35.0.0
  - cloud_federation_api: 2.0.0
  - comments: 2.0.0
  - contacts: 8.9.1
  - contactsinteraction: 2.0.0
  - cookbook: 0.11.12
  - cospend: 4.1.3
  - dashboard: 8.0.0
  - dav: 2.0.0
  - deck: 1.19.0
  - eurooffice: 11.0.6
  - federatedfilesharing: 2.0.0
  - federation: 2.0.0
  - files: 3.0.0
  - files_automatedtagging: 6.0.1
  - files_downloadlimit: 5.3.0
  - files_lock: 35.0.1
  - files_pdfviewer: 8.0.0
  - files_reminders: 2.0.0
  - files_sharing: 2.0.0
  - files_trashbin: 2.0.0
  - files_versions: 2.0.0
  - firstrunwizard: 8.0.0
  - flow_notifications: 6.0.0
  - forms: 5.4.0
  - forum: 1.4.2
  - gpoddersync: 3.18.0
  - integration_mastodon: 5.2.0
  - integration_openai: 5.0.0
  - logreader: 8.0.0
  - lookup_server_connector: 2.0.0
  - memories: 10.1.0
  - news: 29.0.0
  - nextcloud-aio: 0.8.0
  - nextcloud_announcements: 7.0.0
  - nextpod: 0.7.13
  - notes: 6.1.0
  - notifications: 8.0.1
  - notify_push: 1.4.1
  - oauth2: 2.0.0
  - ocs_api_viewer: 1.0.13
  - office: 1.1.0
  - pantry: 0.37.0
  - password_policy: 7.0.0
  - privacy: 7.0.0
  - profile: 2.0.0
  - provisioning_api: 2.0.0
  - recommendations: 8.0.0
  - related_resources: 6.0.0
  - repod: 4.3.3
  - serverinfo: 7.0.0
  - settings: 2.0.0
  - sharebymail: 2.0.0
  - sharing: 1.0.4
  - spreed: 25.0.6
  - support: 7.0.0
  - survey_client: 7.0.0
  - suspicious_login: 13.0.0
  - systemtags: 2.0.0
  - tasks: 0.18.1
  - text: 9.0.1
  - theming: 3.0.0
  - twofactor_backupcodes: 2.0.0
  - twofactor_totp: 17.1.0
  - updatenotification: 2.0.0
  - uppush: 2.6.1
  - user_status: 2.0.0
  - viewer: 8.0.0
  - weather_status: 2.0.0
  - webhook_listeners: 2.0.0
  - whiteboard: 2.0.0
  - workflowengine: 3.0.0
Disabled:
  - context_chat: 5.4.0 (installed 5.4.0)
  - encryption: 3.0.1
  - files_external: 2.0.0
  - guests: 4.9.0 (installed 4.9.0)
  - mail: 5.11.4 (installed 5.11.4)
  - photos: 8.0.0 (installed 2.4.0)
  - testing: 1.23.0
  - theming_customcss: 1.21.0 (installed 1.21.0)
  - twofactor_nextcloud_notification: 9.0.0
  - user_ldap: 2.0.0
  - workflow_script: 5.0.0 (installed 5.0.0)
Nextcloud configuration 
{
    "system": {
        "one-click-instance": true,
        "one-click-instance.user-limit": 100,
        "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
            }
        ],
        "appsallowlist": false,
        "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": "spider.casraf.dev",
        "overwriteprotocol": "https",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "spider.casraf.dev"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "35.0.2.2",
        "overwrite.cli.url": "https:\/\/spider.casraf.dev\/",
        "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,
        "updatedirectory": "\/nc-updater",
        "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",
            "7": "OC\\Preview\\Krita",
            "0": "OC\\Preview\\Imaginary",
            "23": "OC\\Preview\\ImaginaryPDF",
            "24": "OCA\\Eurooffice\\Preview"
        },
        "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",
        "allow_local_remote_servers": true,
        "davstorage.request_timeout": 3600,
        "htaccess.RewriteBase": "\/",
        "htaccess.IgnoreFrontController": true,
        "dbpersistent": false,
        "files_external_allow_create_new_local": true,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "ssl",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpstreamoptions": {
            "ssl": {
                "allow_self_signed": true,
                "verify_peer": false,
                "verify_peer_name": false
            }
        },
        "mail_imapstreamoptions": {
            "ssl": {
                "allow_self_signed": true,
                "verify_peer": false,
                "verify_peer_name": false
            }
        },
        "updater.release.channel": "stable",
        "maintenance_window_start": 100,
        "default_phone_region": "IL",
        "preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
        "auth.bruteforce.protection.enabled": true,
        "ratelimit.protection.enabled": true,
        "memories.db.triggers.fcu": true,
        "memories.exiftool": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/eperl-amd64-musl",
        "memories.vod.path": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/go-vod-amd64",
        "memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
        "memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
        "documentation_url.server_logs": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/5425",
        "debug": false,
        "updatechecker": true,
        "title": "Spider Forum",
        "subtitle": "With great discussions, there must also come great responsibility.",
        "appstoreenabled": "true",
        "serverid": "0",
        "twofactor_enforced": "false",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [],
        "log_type_audit": "file",
        "logfile_audit": "\/var\/www\/html\/data\/audit.log",
        "eurooffice": {
            "editors_check_interval": 0,
            "jwt_secret": "***REMOVED SENSITIVE VALUE***",
            "jwt_header": "AuthorizationJwt"
        },
        "app_install_overwrite": [
            "autocurrency",
            "nextcloud-aio",
            "bookmarks",
            "gpoddersync",
            "news"
        ],
        "DOMAIN": "spider.casraf.dev",
        "AIO_VERSION": "v14.3.0"
    }
}

Browser

Browser name: Firefox

Browser version: 158

Operating system: macOS 27

Browser log

Console log

Content-Security-Policy warnings 2
[WARN] viewer: Some mimes were ignored because they are not enabled in the server previews config 
Object { app: "viewer", uid: "admin", level: 2, ignoredMimes: (1) […] }
<anonymous code>:1:147461
[ERROR] viewer: The following mime is already registered 
Object { app: "viewer", uid: "admin", level: 2, mime: "text/csv", handler: {…} }
<anonymous code>:1:147461
[ERROR] viewer: The following mime is already registered 
Object { app: "viewer", uid: "admin", level: 2, mime: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", handler: {…} }
<anonymous code>:1:147461
[ERROR] viewer: The following mime is already registered 
Object { app: "viewer", uid: "admin", level: 2, mime: "application/vnd.ms-powerpoint", handler: {…} }
<anonymous code>:1:147461
[ERROR] viewer: The following mime is already registered 
Object { app: "viewer", uid: "admin", level: 2, mime: "application/pdf", handler: {…} }
<anonymous code>:1:147461
Initializing unified search plugin-filters from talk talk-search.js:1:141203
Notifications permissions granted NotificationsApp-CzvEF2EG.chunk.mjs:78:63232
Has notify_push enabled, slowing polling to 15 minutes NotificationsApp-CzvEF2EG.chunk.mjs:78:57919
Polling interval updated to 900000 NotificationsApp-CzvEF2EG.chunk.mjs:78:62663
Started background fetcher as session_keepalive is enabled NotificationsApp-CzvEF2EG.chunk.mjs:78:59559
Medium parser loaded app.js:2:9
Got notification data, restoring default polling interval. NotificationsApp-CzvEF2EG.chunk.mjs:78:61618
Content-Security-Policy warnings 2
[WARN] viewer: Some mimes were ignored because they are not enabled in the server previews config 
Object { app: "viewer", uid: "admin", level: 2, ignoredMimes: (1) […] }
<anonymous code>:1:147461
[ERROR] viewer: The following mime is already registered 
Object { app: "viewer", uid: "admin", level: 2, mime: "text/csv", handler: {…} }
<anonymous code>:1:147461
[ERROR] viewer: The following mime is already registered 
Object { app: "viewer", uid: "admin", level: 2, mime: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", handler: {…} }
<anonymous code>:1:147461
[ERROR] viewer: The following mime is already registered 
Object { app: "viewer", uid: "admin", level: 2, mime: "application/vnd.ms-powerpoint", handler: {…} }
<anonymous code>:1:147461
[ERROR] viewer: The following mime is already registered 
Object { app: "viewer", uid: "admin", level: 2, mime: "application/pdf", handler: {…} }
<anonymous code>:1:147461
Initializing unified search plugin-filters from talk talk-search.js:1:141203
Notifications permissions granted NotificationsApp-CzvEF2EG.chunk.mjs:78:63232
Has notify_push enabled, slowing polling to 15 minutes NotificationsApp-CzvEF2EG.chunk.mjs:78:57919
Polling interval updated to 900000 NotificationsApp-CzvEF2EG.chunk.mjs:78:62663
Started background fetcher as session_keepalive is enabled NotificationsApp-CzvEF2EG.chunk.mjs:78:59559
Medium parser loaded app.js:2:9
Got notification data, restoring default polling interval. NotificationsApp-CzvEF2EG.chunk.mjs:78:61618
Source map error: Error: request failed with status 401
Stack in the worker:networkRequest@resource://devtools/client/shared/source-map-loader/utils/network-request.js:43:9

Resource URL: https://nextcloud.example.com/settings/apps/%3Canonymous%20code%3E
Source Map URL: installHook.js.map

Activity

  1. chenasraf
    added
    bug
    on Oct 19, 2026
  2. github-project-automation
    added this to 🧑‍🤝‍🧑 Community triageon Oct 21, 2026
  3. edward-ly
    transferred this issue fromnextcloud/usercontent.apps.nextcloud.comon Oct 21, 2026
  4. github-project-automation
    moved this to To triage in 🧑‍🤝‍🧑 Community triageon Oct 21, 2026

  5. edward-ly commented on Oct 21, 2026

    @edward-ly
    edward-ly
    on Oct 21, 2026
    Contributor

    Might be fixed by #64771. This seems to only affect the NC instance and not the proxy server itself.

  6. pringelmann
    added the
    Bug
    issue type on Oct 22, 2026
  7. pringelmann
    moved this from To triage to Triaged in 🧑‍🤝‍🧑 Community triageon Oct 22, 2026
  8. pringelmann
    added
    0. Needs triagePending check for reproducibility or if it fits our roadmap
    team: FilesCode maintained by 📁 Files team
    35-feedback
    on Oct 22, 2026
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