Issue Summary

with the old editor pages, It is not possible to edit and publish as there is an error " can't save changes".

Steps to Reproduce

1. Access a page with the old editor.
2. Click on edit option.

Expected Results

The edit should be successful and the operation must be saved.

Actual Results

The error message appears " cant save changes". upon checking the browser logs seem like the synchrony is failed.

Request URL: https://confluence-v1.prod.atl-paas.net/master/plugins/fabric_migration/plugin.js
Request Method: GET
Status Code: 404 
Remote Address: 13.224.179.82:443
Referrer Policy: origin
access-control-allow-methods: GET
access-control-allow-origin: *
content-length: 572
content-type: text/html; charset=utf-8
date: Wed, 26 Aug 2020 12:09:31 GMT
server: AmazonS3
status: 404

Workaround

1. Update the page to the new editor.

2. Create a copy of the page and can be used further.