Issue Summary

When creating new Spaces and editing the overview spaces, we get the following message to publish the page: "This content cannot be accessed. Your session may have expired. You'll need to log in again or switch to another account to keep working."

Also, we have noticed another issue with the overview page of new spaces where restoring the older version converts the page to the legacy editor.

Steps to Reproduce

1. Create a new space in any instance
2. Edit the overview page
3. Publish it

Expected Results

Page should get published without issues

Actual Results

It will throw an error:

This content cannot be accessed.

Your session may have expired. You'll need to log in again or switch to another account to keep working.
Log in or switch to another account * 

Workaround

\Wait for a few seconds in the edit mode and make some changes- revert them and Publish the page