[Bug]: Shared folder path resolves to null

⚠️ 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

I have a shared folder that is internally shared between users. For files directly in that Folder the path becomes null which results in this error message when opening the folder from the user that the folder is shared with:

[webdav] Fehler: OC\Files\Storage\Wrapper\Wrapper::getOwner(): Argument #1 ($path) must be of type string, null given, called in /var/www/nextcloud/lib/private/Files/View.php on line 1528
	PROPFIND /remote.php/dav/files/pascal/Filme/
	von 2a02:8070:8981:b640:6708:8517:4476:bf56 von pascal um 14.07.2025, 16:02:53

I replaced $content['path'] on line 1528 in file lib/private/Files/View.php with $content['path'] ?? '' as a workaround and also had to apply the same fix in lib/private/legacy/OC_Helper.php on line 514.

Now opening the shared folder works, but I don't know if this should be fixed on another layer or is already fixed in master (I have Nextcloud version 31.0.7).

Steps to reproduce

1. Create a folder with some files directly in it not subfolders
2. Share it with another internal user or group
3. Try to open the shared folder from the other user

Expected behavior

The folder opens normally

Nextcloud Server version

31

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

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": {
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": {
            "0": "***REMOVED SENSITIVE VALUE***",
        },
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "default_phone_region": "DE",
        "version": "31.0.7.1",
        "overwrite.cli.url": "https:\/\/nextcloudpi\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\Redis",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "tempdirectory": "\/tmp\/nextcloud\/",
        "ldap_log_file": "\/var\/log\/nextcloud\/nextcloud_ldap.log",
        "mail_smtpmode": "smtp",
        "mail_smtpauthtype": "LOGIN",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "preview_max_x": "2048",
        "preview_max_y": "2048",
        "jpeg_quality": "60",
        "overwriteprotocol": "https",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "maintenance_window_start": "4",
        "logfile": "\/var\/log\/nextcloud\/nextcloud.log",
        "loglevel": 2,
        "log_type": "file",
        "app_install_overwrite": {
            "0": "duplicatefinder",
            "1": "impersonate",
            "2": "files_automatedtagging",
            "4": "nextcloudpi",
            "5": "previewgenerator",
            "6": "extract",
            "7": "maps"
        },
        "theme": "",
        "mail_sendmailmode": "smtp",
        "mail_smtpsecure": "ssl",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "data-fingerprint": "5ad324349d54b364515ab62db0c5e1ee",
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory"
    }
}

List of activated Apps

Enabled:
  - activity: 4.0.0
  - admin_audit: 1.21.0
  - app_api: 5.0.2
  - bruteforcesettings: 4.0.0
  - calendar: 5.3.5
  - cloud_federation_api: 1.14.0
  - contacts: 7.1.5
  - dav: 1.33.0
  - deck: 1.15.1
  - federatedfilesharing: 1.21.0
  - federation: 1.21.0
  - files: 2.3.1
  - files_automatedtagging: 2.0.0
  - files_downloadlimit: 4.0.0
  - files_pdfviewer: 4.0.0
  - files_reminders: 1.4.0
  - files_sharing: 1.23.1
  - files_trashbin: 1.21.0
  - files_versions: 1.24.0
  - files_zip: 2.1.0
  - firstrunwizard: 4.0.0
  - impersonate: 2.0.0
  - integration_deepl: 1.3.1
  - logreader: 4.0.0
  - lookup_server_connector: 1.19.0
  - maps: 1.5.0
  - nextcloud_announcements: 3.0.0
  - notifications: 4.0.0
  - notify_push: 1.1.0
  - oauth2: 1.19.1
  - password_policy: 3.0.0
  - photos: 4.0.0
  - previewgenerator: 99.99.99
  - privacy: 3.0.0
  - profile: 1.0.0
  - provisioning_api: 1.21.0
  - recognize: 9.0.3
  - related_resources: 2.0.0
  - richdocuments: 8.7.2
  - richdocumentscode_arm64: 25.4.202
  - serverinfo: 3.0.0
  - settings: 1.14.0
  - sharebymail: 1.21.0
  - support: 3.0.0
  - survey_client: 3.0.0
  - systemtags: 1.21.1
  - text: 5.0.0
  - theming: 2.6.1
  - twofactor_backupcodes: 1.20.0
  - twofactor_totp: 13.0.0-dev.0
  - updatenotification: 1.21.0
  - user_ldap: 1.22.0
  - user_status: 1.11.0
  - viewer: 4.0.0
  - webhook_listeners: 1.2.0
  - workflowengine: 2.13.0
Disabled:
  - circles: 31.0.0 (installed 25.0.0)
  - comments: 1.21.0 (installed 1.15.0)
  - contactsinteraction: 1.12.0 (installed 1.11.0)
  - dashboard: 7.11.0 (installed 7.4.0)
  - encryption: 2.19.0
  - files_external: 1.23.0
  - nextcloudpi: 0.0.2 (installed 0.0.1)
  - recommendations: 4.0.0 (installed 1.3.0)
  - suspicious_login: 9.0.1 (installed 9.0.1)
  - twofactor_nextcloud_notification: 5.0.0 (installed 3.8.0)
  - weather_status: 1.11.0 (installed 1.5.0)

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"aHUNatkL_lnY2QZby1pGTgAACgo","level":3,"time":"2025-07-14T14:00:10+00:00","remoteAddr":"2a02:8070:8981:b640:6708:8517:4476:bf56","user":"pascal","app":"files","method":"GET","url":"/ocs/v2.php/apps/files/api/v1/folder-tree?path=%2F&depth=1","message":"OC\\Files\\Storage\\Wrapper\\Wrapper::getOwner(): Argument #1 ($path) must be of type string, null given, called in /var/www/nextcloud/lib/private/Files/View.php on line 1528","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0","version":"31.0.7.1","exception":{"Exception":"TypeError","Message":"OC\\Files\\Storage\\Wrapper\\Wrapper::getOwner(): Argument #1 ($path) must be of type string, null given, called in /var/www/nextcloud/lib/private/Files/View.php on line 1528","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1528,"function":"getOwner","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->"},{"function":"OC\\Files\\{closure}","class":"OC\\Files\\View","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1524,"function":"array_map"},{"file":"/var/www/nextcloud/lib/private/Files/Node/Folder.php","line":81,"function":"getDirectoryContent","class":"OC\\Files\\View","type":"->"},{"file":"/var/www/nextcloud/apps/files/lib/Controller/ApiController.php","line":266,"function":"getDirectoryListing","class":"OC\\Files\\Node\\Folder","type":"->"},{"file":"/var/www/nextcloud/apps/files/lib/Controller/ApiController.php","line":311,"function":"getChildren","class":"OCA\\Files\\Controller\\ApiController","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":200,"function":"getFolderTree","class":"OCA\\Files\\Controller\\ApiController","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/ocs/v1.php","line":49,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/ocs/v2.php","line":7,"args":["/var/www/nextcloud/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php","Line":183,"message":"OC\\Files\\Storage\\Wrapper\\Wrapper::getOwner(): Argument #1 ($path) must be of type string, null given, called in /var/www/nextcloud/lib/private/Files/View.php on line 1528","exception":[],"CustomMessage":"OC\\Files\\Storage\\Wrapper\\Wrapper::getOwner(): Argument #1 ($path) must be of type string, null given, called in /var/www/nextcloud/lib/private/Files/View.php on line 1528"},"id":"687516286fd50"}

Additional info

No response

Start at lib/private/Files/View.php line 1528 and follow the call path through lib/private/Files/Node/Folder.php line 81 and apps/files/lib/Controller/ApiController.php lines 266 and 311. Compare this with the workaround in lib/private/legacy/OC_Helper.php line 514, then reproduce an internally shared folder containing direct files. Done means the shared folder opens without the null-path TypeError.