Editing of a page does not work when collaborative editing is on

[miloban]

Environvment

Confluence server: v7.4.1

Ubuntu Server: Ubuntu 20.04

Confluence http port: 8092

Confluence control port: 8002

Synchrony port: 8091 (tried changing to 8093)

Reverse proxy: none

When I try editing a page the loader keeps spinning and the popup in the top right corner shows up saying: "This page is taking longer to load than usual. Give it a few moments, then try refreshing. Still having issues? Contact your Confluence admin."

And after some time another popup: "The editor didn't load this time The connection timed out. If it happens again, speak to your Confluence admin. You may be using a proxy server that prevents WebSocket connections"

In the browser console and atlassian-synchrony.log i can see that some requests are failing with status 401:

/synchrony-proxy/v1/data/Synchrony-978f9567-0e7c-3a2c-baf6-c3e3768fd859/confluence-65624?state-at=@head&state-format=type-tagged&rewrite-request=true&cached=true

Response: {"type":"jwt/unknown-iss","message":"Error validating JWT:JWT appID not recognised"}

/synchrony-proxy/v1/data/Synchrony-978f9567-0e7c-3a2c-baf6-c3e3768fd859/confluence-65624?optimistic=true&rewrite-request=true

Response: {"type":"jwt/unknown-iss","message":"Error validating JWT:JWT appID not recognised"}

[Fabian Lim]

Hi Miloban,

I recommend you review the following troubleshooting guide to see if you can resolve your issues: https://confluence.atlassian.com/doc/troubleshooting-collaborative-editing-858772087.html

If you still have problems, you would be better off contacting Atlassian Support.