Nextcloud file bridge not available without page reload

[archont00]

Hi,

In some situations, the bridge fails with error "Nextcloud file bridge not available". After page reload (key F5), it works again.

How to reproduce

1. Click on Roundcube app icon in Nexctloud top app bar.
2. Click on a message with attachment in INBOX.
3. At the attachment, choose "Save to Nextcloud"
4. A notification in red box "Nextcloud file bridge not available" appears and nothing happens.
5. Reload the page (F5 key).
6. At the attachment, choose "Save to Nextcloud" - it works, file saving window appears and file can be saved.
7. Click on Roundcube "Settings" or "Contacts" icon to display its respective page.
8. Click on Roundcume "Mail" icon (above "Contacts") to display INBOX again.
9. Click on a message with attachment.
10. At the attachment, choose "Save to Nextcloud".
11. A notification in red box "Nextcloud file bridge not available" appears and nothing happens.
12. Reloading the page makes it work again...

Environment

• Nextcloud AIO v13.2.1 with Nextcloud Hub 26 Winter (33.0.5)
• RoundCube Bridge Nextcloud app - Version 1.2.0
• Roundcube Mail Nextcloud app - Version 1.2.2
• Roundcube Webmail 1.7.1 in official docker container.
• Nextcloud URL: https://cloud.example.net
  • behind traefik with TLS termination;
  • no changes in Nextcloud AIO web server (apache) configuration.
• Roundcube path: https://cloud.example.net/roundcube/
  • behind traefik with TLS termination;
  • traefik rule matches cloud.example/roundcube with high priority before the domain can be served Nextcloud AIO container;
  • traefik strips path prefix /roundcube and proxies to Roundcube Webmail container service.