imagemagick convert script doesn't work

Steps to reproduce

1. Install external scripts
2. Add automated tagging to uploaded files
3. Run the command 'convert %x -interlace plane -strip -quality 80 -resize 1000x1000> $(basename %x)_1.jpg' on files that are tagged accordingly to step 2.

Expected behaviour

Image files should be converted according to command settings and have it's original name with the suffix '_1'. This works properly when the command is run directly at the server.

Actual behaviour

Nothing happens at all - flow log is empty. The automated tagging applies, but not the external script.

Workflow Script app

Workflow Script app version: 1.4.0

Server configuration

Operating system: Ubuntu Server 20.04 LTS

Web server: Nginx

Database: MariaDB 10.3.22

PHP version: 7.4.3

Nextcloud Version: 19.0.3

Where did you install Nextcloud from: Nextcloud

Signing status:

No errors have been found.

List of activated apps:

``` Enabled: - accessibility: 1.5.0 - activity: 2.12.0 - admin_audit: 1.9.0 - analytics: 2.5.0 - bruteforcesettings: 2.0.1 - cloud_federation_api: 1.2.0 - contactsinteraction: 1.0.0 - dav: 1.15.0 - federatedfilesharing: 1.9.0 - files: 1.14.0 - files_automatedtagging: 1.9.0 - files_external: 1.10.0 - files_rightclick: 0.16.0 - files_sharing: 1.11.0 - files_trashbin: 1.9.0 - files_versions: 1.12.0 - logreader: 2.4.0 - lookup_server_connector: 1.7.0 - metadata: 0.12.0 - notifications: 2.7.0 - oauth2: 1.7.0 - password_policy: 1.9.1 - provisioning_api: 1.9.0 - serverinfo: 1.9.0 - settings: 1.1.0 - sharebymail: 1.9.0 - systemtags: 1.9.0 - text: 3.0.1 - theming: 1.10.0 - theming_customcss: 1.6.0 - twofactor_backupcodes: 1.8.0 - updatenotification: 1.9.0 - viewer: 1.3.0 - workflow_script: 1.4.0 - workflowengine: 2.1.0 ```

Nextcloud configuration:

``` "system": { "instanceid": "***REMOVED SENSITIVE VALUE***", "passwordsalt": "***REMOVED SENSITIVE VALUE***", "secret": "***REMOVED SENSITIVE VALUE***", "trusted_domains": [ "***REMOVED SENSITIVE VALUE***" ], "datadirectory": "***REMOVED SENSITIVE VALUE***", "dbtype": "mysql", "version": "19.0.3.1", "overwrite.cli.url": "***REMOVED SENSITIVE VALUE***", "dbname": "***REMOVED SENSITIVE VALUE***", "dbhost": "***REMOVED SENSITIVE VALUE***", "dbport": "", "dbtableprefix": "oc_", "mysql.utf8mb4": true, "dbuser": "***REMOVED SENSITIVE VALUE***", "dbpassword": "***REMOVED SENSITIVE VALUE***", "installed": true, "activity_expire_days": 14, "auth.bruteforce.protection.enabled": true, "blacklisted_files": [ ".htaccess", "Thumbs.db", "thumbs.db" ], "cron_log": true, "enable_previews": true, "enabledPreviewProviders": [ "OC\\Preview\\PNG", "OC\\Preview\\JPEG", "OC\\Preview\\GIF", "OC\\Preview\\BMP", "OC\\Preview\\XBitmap", "OC\\Preview\\Movie", "OC\\Preview\\PDF", "OC\\Preview\\MP3", "OC\\Preview\\TXT", "OC\\Preview\\MarkDown" ], "filesystem_check_changes": 0, "filelocking.enabled": "true", "htaccess.RewriteBase": "\/", "integrity.check.disabled": false, "knowledgebaseenabled": false, "logfile": "\/var\/nc_data\/nextcloud.log", "loglevel": 2, "logtimezone": "Europe\/Stockholm", "log_rotate_size": 104857600, "maintenance": false, "memcache.local": "\\OC\\Memcache\\APCu", "memcache.locking": "\\OC\\Memcache\\Redis", "overwriteprotocol": "https", "preview_max_x": 1024, "preview_max_y": 768, "preview_max_scale_factor": 1, "redis": { "host": "***REMOVED SENSITIVE VALUE***", "port": 0, "timeout": 0 }, "quota_include_external_storage": false, "share_folder": "\/Shares", "skeletondirectory": "\/var\/www\/nextcloud\/default-files", "theme": "", "trashbin_retention_obligation": "auto, 7", "updater.release.channel": "stable" ```

Are you using external storage, if yes which one: Testing on Local but the plan is to have this applied on files in external storage (SMB)

Are you using encryption: no

Server log (data/nextcloud.log)

``` Insert your server log here ```

Il payload indica l’app workflow_script e il comando ImageMagick, ma non specifica alcun file sorgente né alcun test. Inizia riproducendo il comando tramite il tagging automatizzato e analizza il flusso e i log del server; il lavoro è completato quando lo script esterno viene eseguito e crea il file convertito con il nome originale più il suffisso _1.