Websocket connection to collabora with nextcloud(-aio) throws error 400 #423

New Issue

MrUnknownDE · 2026-04-05T17:09:44+02:00

MrUnknownDE commented

2026-04-05 17:09:44 +02:00

Originally created by @Joly0 on 12/28/2025

Describe the Bug

I have switched a while ago to pangolin and have not noticed issues with collabora in nextcloud until now (though havent used that feature in nextcloud for a while). Just now i noticed, that files like excel or word files dont load and throw this error in nextcloud:

In the dev console i see that it tries to reach an wss:// url pointing to my nextcloud instance but throws a 400 bad request error.

I am not sure, what exactly throws this issue, but i tried it with nginx-proxy-manager and there it works no problem.

Environment

OS Type & Version: (e.g., Ubuntu 22.04) Debian 12
Pangolin Version: 1.14.1
Gerbil Version: 1.3.0
Traefik Version: v3.6.4
Newt Version: 1.8.1
Olm Version: (if applicable)

To Reproduce

Install nextcloud and collabora (perferably with nextcloud-aio).
Create pangolin rule for nextcloud
Create excel file
Try to open that excel file
See errro

Expected Behavior

Should just open the file and correctly work with websocket connections

*Originally created by @Joly0 on 12/28/2025* ### Describe the Bug I have switched a while ago to pangolin and have not noticed issues with collabora in nextcloud until now (though havent used that feature in nextcloud for a while). Just now i noticed, that files like excel or word files dont load and throw this error in nextcloud: <img width="1874" height="330" alt="Image" src="https://github.com/user-attachments/assets/00c508c8-2588-428e-b91a-390fa4fc7924" /> In the dev console i see that it tries to reach an wss:// url pointing to my nextcloud instance but throws a 400 bad request error. I am not sure, what exactly throws this issue, but i tried it with nginx-proxy-manager and there it works no problem. ### Environment - OS Type & Version: (e.g., Ubuntu 22.04) Debian 12 - Pangolin Version: 1.14.1 - Gerbil Version: 1.3.0 - Traefik Version: v3.6.4 - Newt Version: 1.8.1 - Olm Version: (if applicable) ### To Reproduce Install nextcloud and collabora (perferably with nextcloud-aio). Create pangolin rule for nextcloud Create excel file Try to open that excel file See errro ### Expected Behavior Should just open the file and correctly work with websocket connections

MrUnknownDE closed this issue

2026-04-05 17:09:44 +02:00

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Reference: github/pangolin#423