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Help, why can onlyOffice preview online but not edit online?

This is my first time using onlyOffice. After integrating into my project, I can normally preview online, but I cannot edit online. What happened? How does it need to be addressed?The first time I used this, I really didn’t have any ideas. Thank you!

The error message is:

[ERROR] nodeJS - changesError: docId = undefined Error: Uncaught TypeError: Cannot read properties of null (reading 'change') Script: Line: 76:7249 userAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36 platform: MacIntel isLoadFullApi: true isDocumentLoadComplete: false StackTrace: TypeError: Cannot read properties of null (reading 'change')
    at M.i.onEditorPermissions (
    at E (
    at Fa.<anonymous> (
    at Fa.<anonymous> (
    at Fa.trigger (
    at nd.we (
    at nd.nVd (
    at xl.ROa (
    at nd.gYf (
    at Yl.ROa (

The server: centos7
docker version: 20.10.17
onlyoffice: 6.4.2

Hello @cisco

I can see that you are using version 6.4.2-6 which is already an outdated version.
Please update your instance to the actual version and check the issue again.

In addition, could you please provide a guide that you’ve used to install Document Server?