"Connection Loss" – file download is offered instead opening office editor until reapplying app configuration

[4001982248998]

Description
Connection to a Collabora (Nextcloud Office) service running as docker container is setup and working. But after a few hours, when clicking on an odt file, a download dialogue opens instead of Collabora.

It is, however, able to start the office editor by using the three-point-menu and then choosing "edit in Nextcloud Office"!

Access to the Nextcloud Office app is limited to a certain user group. That is configured in Nextcloud's app administration page.

To Reproduce
Steps to reproduce the behavior:

1. Setup Collabora connector in Nextcloud, confirm it's working
2. Wait a few hours, maybe logoff from Nextcloud
3. Click on an office document
4. A file download dialogue will open. Bad!
5. Go to Nextcloud's App configuration and reapply the Collabora connection
6. Click on an office document
7. Now Collabora opens again

Expected behavior
After clicking on an office document, Collabora office should start always, not only after reapplying the connection.

Server details

• Operating system: Ubuntu
• Web server: Apache2
• Database: MariaDB
• PHP version: 8.1
• Nextcloud version: 28.0.5
• Version of the richdocuments app: 8.3.7
• Version of Collabora Online: Collabora Online Development Edition 24.04.1.3 89a7742 or Collabora Online Development Edition 24.04.3.1 594b605
• Configuration of the richdocuments app

{
    "apps": {
        "richdocuments": {
            "disable_certificate_verification": "",
            "edit_groups": "collabora-test",
            "enabled": "yes",
            "external_apps": "",
            "installed_version": "8.3.7",
            "public_wopi_url": "https:\/\/my.host.com",
            "types": "prevent_group_restriction",
            "use_groups": "collabora-test",
            "wopi_allowlist": "my-host-ip\/32",
            "wopi_url": "https:\/\/my.host.com"
        }
    }
}

[Niemand112233]

Have the same problem on NC 29.0.1 and a dedicated collabora instance (which is working on another NC), but I can't get it back to work.

[joshtrichards]

Can you check your Nextcloud log during the time window between it working and stopping working? I suspect you'll have some errors there. Possible saying "Failed to fetch [...]" or similar.

[juliushaertl]

This might be addressed by #3749 which makes the cached response if the Collabora server is setup permanent and no longer expiring if the background fetch fails