ONLYOFFICE cannot be reached. Please contact admin

[chf0x]

This issue is unique.

• I have used the search tool and did not find an issue describing my bug.

Operating System of DocumentServer

Docker

Version information

8.1.3.4

Expected Behavior

I've set up Nextcloud and OnlyOffice, both using Docker, with Traefik as a reverse proxy. This setup has been running smoothly for a few years without any issues

Actual Behavior

After a recent update, something seems to be broken. When I try to open a file with ONLYOFFICE, I get the error message: "ONLYOFFICE cannot be reached. Please contact the admin." I didn't make any changes to my setup, only updated the containers.

Interestingly, in the settings, I can see that Nextcloud still detects the ONLYOFFICE instance. When I enter the settings and press "Save," it successfully detects the version.

Reproduction Steps

I'm not sure how to reproduce this issue. I simply updated the Docker containers, and now it's broken. Please let me know if I can provide any additional logs.

Additional information

I am using Nextcloud Hub 8 (29.0.6)