PDF viewer is not updated

[pcflash]

1. Make a last update (Nextcloud 29.0.9.2)
2. Open, a PDF with PDF viewer
3. PDF viewer is not updated , no new version available

sudo -u www-data php /var/www/cloud/occ app:install files_pdfviewer
Error: Client error: GET https://github.com/nextcloud/files_pdfviewer/releases/download/v1.2.1/files_pdfviewer-1.2.1.tar.gz resulted in a 404 Not Found response:
Not Found

sudo -u www-data php /var/www/cloud/occ app:enable files_pdfviewer --force
App "PDF viewer" cannot be installed because it is not compatible with this version of the server.

Any other solution for open a PDF online?

[joshtrichards]

files_pdfviewer is a shipped app (and has been for a while). It comes with Nextcloud Server.

If you have an old version, perhaps you have multiple apps paths (with an ancient version in one of your apps folders from before it was a shipped app).. Can't say without more info. You can get troubleshooting assistance via https://help.nextcloud.com by posting your environment details and config.