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[Bug]: Selecting a blank background on theming doesn't work on login screen #34968

@muchachagrande

Description

@muchachagrande

⚠️ 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).
  • Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
  • Nextcloud Server is running on 64bit capable CPU, PHP and OS.
  • I agree to follow Nextcloud's Code of Conduct.

Bug description

After the last update from 25.0.0 to 25.0.1 theming blank background doesn't work for login screen.
I use a blank background for the login screen, but now it is showing the default Nextcloud background photo (the cloudy sky).
If I chose an image it works, but it doesn't work with a blank background.
The blank background does show on main user screen once legged in.

Steps to reproduce

  1. Login to admin account
  2. Navigate to theming administration configuration
  3. Select a background color and remove any existing background image
  4. Logout

Expected behavior

It should show a blank colored background, but it shows the default Nextcloud background photo of the clouds and the sky.

Installation method

Community VM appliance

Operating system

No response

PHP engine version

PHP 8.1

Web server

Apache (supported)

Database engine version

PostgreSQL

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

Updated from a minor version (ex. 22.2.3 to 22.2.4)

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": {
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "x.x.x.x",
            "cloud.xxx.com",
        ],
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "allow_local_remote_servers": true,
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "25.0.1.1",
        "overwrite.cli.url": "https:\/\/cloud.xxx.com\/",
        "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***",
        "upgrade.disable-web": true,
        "log_type": "file",
        "logfile": "\/var\/log\/nextcloud\/nextcloud.log",
        "loglevel": "2",
        "log.condition": {
            "apps": [
                "admin_audit"
            ]
        },
        "mail_smtpmode": "smtp",
        "remember_login_cookie_lifetime": "1800",
        "log_rotate_size": "10485760",
        "trashbin_retention_obligation": "auto, 60",
        "versions_retention_obligation": "auto, 180",
        "activity_expire_days": "120",
        "simpleSignUpLink.shown": false,
        "memcache.local": "\\OC\\Memcache\\Redis",
        "filelocking.enabled": true,
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0.5,
            "dbindex": 0,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "default_phone_region": "us",
        "logtimezone": "America\/Argentina\/Buenos_Aires",
        "default_language": "es_AR",
        "force_language": "es_AR",
        "default_locale": "es_AR",
        "force_locale": "es_AR",
        "htaccess.RewriteBase": "\/",
        "maintenance": false,
        "mail_smtpsecure": "ssl",
        "mail_sendmailmode": "smtp",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "mail_smtpauthtype": "LOGIN",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "knowledgebaseenabled": false,
        "lost_password_link": "disabled",
        "enable_previews": true,
        "enabledPreviewProviders": [
            "OC\\Preview\\MP3",
            "OC\\Preview\\TXT",
            "OC\\Preview\\MarkDown",
            "OC\\Preview\\Krita",
            "OC\\Preview\\OpenDocument",
            "OC\\Preview\\Imaginary",
            "OC\\Preview\\PDF",
            "OC\\Preview\\MSOffice2003",
            "OC\\Preview\\MSOfficeDoc",
            "OC\\Preview\\MSOffice2007",
            "OC\\Preview\\StarOffice",
            "OC\\Preview\\SVG",
            "OC\\Preview\\TIFF",
            "OC\\Preview\\Font",
            "OC\\Preview\\Movie",
            "OC\\Preview\\MKV",
            "OC\\Preview\\MP4",
            "OC\\Preview\\AVI",
            "OC\\Preview\\Illustrator",
            "OC\\Preview\\Photoshop",
            "OC\\Preview\\Postscript",
            "OC\\Preview\\Epub"
        ],
        "preview_imaginary_url": "http:\/\/127.0.0.1:9001",
        "twofactor_enforced": "false",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [],
        "skeletondirectory": "",
        "theme": "",
        "filesystem_check_changes": true,
        "app_install_overwrite": [
            "passwords",
            "backup",
            "extract",
            "keeweb",
            "metadata",
            "phonetrack",
            "socialsharing_email"
        ]
    }
}

List of activated Apps

Enabled:
  - activity: 2.17.0
  - admin_audit: 1.15.0
  - bookmarks: 11.0.4
  - bruteforcesettings: 2.5.0
  - calendar: 4.1.0
  - cfg_share_links: 3.0.0
  - circles: 25.0.0
  - cloud_federation_api: 1.8.0
  - comments: 1.15.0
  - contacts: 5.0.1
  - contactsinteraction: 1.6.0
  - dashboard: 7.5.0
  - dav: 1.24.0
  - extract: 1.3.5
  - federatedfilesharing: 1.15.0
  - federation: 1.15.0
  - files: 1.20.1
  - files_external: 1.17.0
  - files_pdfviewer: 2.6.0
  - files_rightclick: 1.4.0
  - files_sharing: 1.17.0
  - files_trashbin: 1.15.0
  - files_versions: 1.18.0
  - keeweb: 0.6.10
  - logreader: 2.10.0
  - lookup_server_connector: 1.13.0
  - mail: 2.1.0
  - maps: 0.2.1
  - metadata: 0.17.0
  - nextcloud_announcements: 1.14.0
  - notes: 4.6.0
  - notifications: 2.13.1
  - notify_push: 0.5.0
  - oauth2: 1.13.0
  - password_policy: 1.15.0
  - passwords: 2022.11.20-build4610
  - phonetrack: 0.7.2
  - photos: 2.0.0
  - privacy: 1.9.0
  - provisioning_api: 1.15.0
  - qownnotesapi: 22.10.0
  - recommendations: 1.4.0
  - related_resources: 1.0.3
  - richdocuments: 7.0.1
  - serverinfo: 1.15.0
  - settings: 1.7.0
  - sharebymail: 1.15.0
  - socialsharing_email: 2.5.0
  - spreed: 15.0.1
  - suspicious_login: 4.3.0
  - systemtags: 1.15.0
  - tasks: 0.14.5
  - text: 3.6.0
  - theming: 2.0.1
  - twofactor_backupcodes: 1.14.0
  - twofactor_nextcloud_notification: 3.5.0
  - twofactor_totp: 7.0.0
  - updatenotification: 1.15.0
  - user_status: 1.5.0
  - viewer: 1.9.0
  - weather_status: 1.5.0
  - workflowengine: 2.7.0
Disabled:
  - backup: 1.1.3
  - encryption
  - firstrunwizard: 2.13.0
  - support: 1.7.0
  - survey_client: 1.12.0
  - user_ldap

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

No log lines on this subject

Additional info

Occurred on last update from 25.0.0 to 25.0.1.

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