[Bug]: Undefined array key "preview_ffmpeg_path"

⚠️ This issue respects the following points: ⚠️

[X] This is a bug, not a question or a configuration/webserver/proxy issue.
[X] This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
[X] Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
[X] I agree to follow Nextcloud's Code of Conduct.

Bug description

Updated to the newest version of nextcloud (27.0.2_1.6.43) on my Truenas server and my recognize was not scaning properly so I checked my logs and I get this error.

Steps to reproduce

Change settings in Nextcloud settings

Expected behavior

No error

Installation method

Other Community project

Nextcloud Server version

Operating system

Other

PHP engine version

PHP 8.2

Web server

Other

Database engine version

PostgreSQL

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

Updated from a MINOR version (ex. 22.1 to 22.2)

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": {
        "htaccess.RewriteBase": "\/",
        "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
            }
        ],
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "10.0.0.21",
            "drive.kyllan.dev"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "27.0.2.1",
        "overwrite.cli.url": "http:\/\/localhost",
        "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***",
        "default_phone_region": "US",
        "enable_previews": true,
        "memories.exiftool": "\/var\/www\/html\/custom_apps\/memories\/exiftool-bin\/exiftool-amd64-glibc",
        "memories.vod.path": "\/var\/www\/html\/custom_apps\/memories\/exiftool-bin\/go-vod-amd64",
        "memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
        "memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
        "enabledPreviewProviders": [
            "OC\\Preview\\Image",
            "OC\\Preview\\HEIC",
            "OC\\Preview\\TIFF",
            "OC\\Preview\\Movie"
        ],
        "preview_max_x": 1024,
        "preview_max_y": 1024,
        "preview_max_memory": 4096,
        "memories.vod.disable": false,
        "memories.vod.external": true,
        "maintenance": false,
        "loglevel": 2,
        "memories.gis_type": 2
    }
}

List of activated Apps

Enabled:
  - activity: 2.19.0
  - analytics: 4.10.0
  - audioplayer: 3.4.0
  - camerarawpreviews: 0.8.2
  - circles: 27.0.1
  - cloud_federation_api: 1.10.0
  - comments: 1.17.0
  - contactsinteraction: 1.8.0
  - dashboard: 7.7.0
  - dav: 1.27.0
  - drawio: 2.1.2
  - externalportal: 1.2.0
  - federatedfilesharing: 1.17.0
  - federation: 1.17.0
  - files: 1.22.0
  - files_3dmodelviewer: 0.0.12
  - files_pdfviewer: 2.8.0
  - files_rightclick: 1.6.0
  - files_sharing: 1.19.0
  - files_trashbin: 1.17.0
  - files_versions: 1.20.0
  - firstrunwizard: 2.16.0
  - imageconverter: 1.3.5
  - integration_openai: 1.0.11
  - logreader: 2.12.0
  - lookup_server_connector: 1.15.0
  - maps: 1.1.0
  - memories: 5.4.1
  - nextcloud_announcements: 1.16.0
  - notifications: 2.15.0
  - oauth2: 1.15.1
  - password_policy: 1.17.0
  - photos: 2.3.0
  - privacy: 1.11.0
  - provisioning_api: 1.17.0
  - recognize: 4.3.2
  - recommendations: 1.6.0
  - related_resources: 1.2.0
  - serverinfo: 1.17.0
  - settings: 1.9.0
  - sharebymail: 1.17.0
  - support: 1.10.0
  - survey_client: 1.15.0
  - systemtags: 1.17.0
  - text: 3.8.0
  - theming: 2.2.0
  - twofactor_backupcodes: 1.16.0
  - updatenotification: 1.17.0
  - user_status: 1.7.0
  - viewer: 2.1.0
  - weather_status: 1.7.0
  - workflowengine: 2.9.0
Disabled:
  - admin_audit: 1.17.0
  - bruteforcesettings: 2.7.0
  - encryption: 2.15.0
  - facerecognition: 0.9.20
  - files_external: 1.19.0
  - suspicious_login: 5.0.0
  - twofactor_totp: 9.0.0
  - user_ldap: 1.17.0

Nextcloud Signing status

Page not found

Nextcloud Logs

{"reqId":"x5H4iIyhTeDyRZdUstKV","level":3,"time":"2023-09-04T04:01:42+00:00","remoteAddr":"10.0.0.11","user":"root","app":"PHP","method":"GET","url":"/apps/memories/api/system-status","message":"Undefined array key \"preview_ffmpeg_path\" at /var/www/html/custom_apps/memories/lib/Util.php#363","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.15","version":"27.0.2.1","data":{"app":"PHP"},"id":"64f62dcc66f8d"}

Additional info

No response

nextcloud / server

[Bug]: Undefined array key "preview_ffmpeg_path" #40259