qBittorent WEBUI issue after upgrade to v4.1.5

[clubdude]

Hello.

Two days ago I saw in App Center that new version of qBittorent is available and I did update.
Since a update was done there was impossible connect to WEBUI .
Looks like a new version have problem to access languages files.
My system running TOS version 6.0.673

Here is a log with error:

(N) 2025-05-03T22:50:58 - Using built-in WebUI.
(W) 2025-05-03T22:50:58 - Couldn't load WebUI translation for selected locale (C).
(N) 2025-05-03T22:50:58 - WebUI: HTTPS setup successful
(N) 2025-05-03T22:50:58 - WebUI: Now listening on IP: *, port: 8282
(I) 2025-05-03T22:50:58 - UPnP/NAT-PMP port mapping succeeded. Message: "successfully mapped port using NAT-PMP. local: 192.168.1.100 external port: TCP/8283"
(W) 2025-05-03T22:50:58 - UPnP/NAT-PMP port mapping failed. Message: "could not map port using UPnP[192.168.1.100]: unknown UPnP error (606)"
(N) 2025-05-03T22:51:00 - qBittorrent termination initiated
(N) 2025-05-03T22:51:00 - Saving resume data completed.
(N) 2025-05-03T22:51:03 - BitTorrent session successfully finished.
(N) 2025-05-03T22:51:03 - qBittorrent is now ready to exit

[TMLila]

Hello.

Two days ago I saw in App Center that new version of qBittorent is available and I did update.
Since a update was done there was impossible connect to WEBUI .
Looks like a new version have problem to access languages files.
My system running TOS version 6.0.673

Here is a log with error:

(N) 2025-05-03T22:50:58 - Using built-in WebUI.
(W) 2025-05-03T22:50:58 - Couldn't load WebUI translation for selected locale (C).
(N) 2025-05-03T22:50:58 - WebUI: HTTPS setup successful
(N) 2025-05-03T22:50:58 - WebUI: Now listening on IP: *, port: 8282
(I) 2025-05-03T22:50:58 - UPnP/NAT-PMP port mapping succeeded. Message: "successfully mapped port using NAT-PMP. local: 192.168.1.100 external port: TCP/8283"
(W) 2025-05-03T22:50:58 - UPnP/NAT-PMP port mapping failed. Message: "could not map port using UPnP[192.168.1.100]: unknown UPnP error (606)"
(N) 2025-05-03T22:51:00 - qBittorrent termination initiated
(N) 2025-05-03T22:51:00 - Saving resume data completed.
(N) 2025-05-03T22:51:03 - BitTorrent session successfully finished.
(N) 2025-05-03T22:51:03 - qBittorrent is now ready to exit

Hi!Thank you for your feedback. We have recorded this issue and will verify it as soon as possible.
In the meantime, you may try the following steps:
1. Uninstall the qBittorrent application completely.
2. Rename the original qBittorrent shared folder.
3. Reinstall the latest version of qBittorrent.
If the issue persists after these steps, please feel free to contact us.

[annajoy]

I recommend launching qBittorrent with a specific supported locale (e.g., en or en_US) rather than letting it default to C.