No PDF generated, no log

Hi,

I set up a PDF conversion flow as follows:
When File created, File updated
and File MIME type matches Office documents
=> Keep original, overwrite existing PDF

I'd expect that when creating a new odt file with Collabora Online Development Edition, or just uploading a new odt file, I would see its corresponding pdf appearing aside, but nothing happens.

And absolutely nothing in the nextcloug log (loglevel : 2).

libreoffice --headless --invisible --norestore --convert-to pdf file.odt works fine in a terminal.

PDF Converter app

PDF Converter app version: 1.3.1

Server configuration

Operating system:
Ubuntu 18.04
Web server:
nginx 1.14.0
Database:
MariaDB 10.1.44
PHP version:
PHP 7.4.6
Nextcloud Version:
18.0.4

LibreOffice 6.0.7

# which libreoffice
/usr/bin/libreoffice

List of activated apps:
Enabled:

• accessibility: 1.4.0
• activity: 2.11.0
• admin_audit: 1.8.0
• apporder: 0.9.0
• bookmarks: 3.0.13
• breezedark: 18.0.16
• bruteforcesettings: 1.6.0
• calendar: 2.0.3
• cloud_federation_api: 1.1.0
• comments: 1.8.0
• contacts: 3.3.0
• dav: 1.14.0
• deck: 1.0.1
• external: 3.5.0
• federatedfilesharing: 1.8.0
• federation: 1.8.0
• files: 1.13.1
• files_accesscontrol: 1.8.1
• files_external: 1.9.0
• files_linkeditor: 1.0.13
• files_lock: 0.8.1
• files_mindmap: 0.0.21
• files_pdfviewer: 1.7.0
• files_rightclick: 0.15.2
• files_sharing: 1.10.1
• files_trashbin: 1.8.0
• files_versions: 1.11.0
• files_videoplayer: 1.7.0
• firstrunwizard: 2.7.0
• forms: 1.1.1
• groupfolders: 6.0.6
• impersonate: 1.5.0
• logreader: 2.3.0
• lookup_server_connector: 1.6.0
• nextcloud_announcements: 1.7.0
• notifications: 2.6.0
• oauth2: 1.6.0
• ownpad: 0.6.14
• password_policy: 1.8.0
• passwords: 2020.5.0
• photos: 1.0.0
• polls: 1.4.3
• previewgenerator: 2.3.0
• privacy: 1.2.0
• provisioning_api: 1.8.0
• quickaccesssorting: 1.0.3
• quota_warning: 1.7.0
• recommendations: 0.6.0
• richdocuments: 3.6.0
• serverinfo: 1.8.0
• settings: 1.0.0
• sharebymail: 1.8.0
• spreed: 8.0.9
• support: 1.1.0
• survey_client: 1.6.0
• systemtags: 1.8.0
• tasks: 0.13.1
• theming: 1.9.0
• theming_customcss: 1.5.0
• twofactor_backupcodes: 1.7.0
• updatenotification: 1.8.0
• viewer: 1.2.0
• workflow_pdf_converter: 1.3.1
• workflowengine: 2.0.0

Disabled:

• encryption
• end_to_end_encryption
• text
• user_ldap

Nextcloud configuration:

'enable_previews' => true,
'preview_libreoffice_path' => '/usr/bin/libreoffice',
'preview_office_cl_parameters' => ' --headless --invisible --norestore --convert-to pdf ',

Are you using external storage, if yes which one: local/smb/sftp/...
No

Are you using encryption: yes/no
No

Server log (data/nextcloud.log)

Nothing

Start by reproducing the PDF Converter workflow with a newly uploaded ODT file and inspect the Nextcloud log and the configured LibreOffice command. The payload names no source files or tests, so trace the workflow entry point and conversion path before changing anything. Done means a PDF is created beside the source document and failures produce a useful log entry.