Editing multiple spaces throws 404 error in the global permissions guest tab

Issue Summary

Editing multiple spaces throws 404 error in the global permissions guest tab

Steps to Reproduce

1. Invite a user as a guest
2. add  the user to the group that provides access to Confluence as standard User (e.g. confluence-users-<INSTANCE_NAME>)
3. Enter the global permissions guest tab at the URL https://<INSTANCE_NAME>atlassian.net/wiki/admin/permissions/global?tab=external
4. the user will have access to "Multiple spaces"
5. click on ... >> "Edit spaces"

Expected Results

The site admin will see the spaces to which the user has access to

Actual Results

The following error is shown:

•  "We couldn't find what you're looking for"
• "We looked everywhere, but it doesn't exist. It may have been deleted. Unless, of course, the URL has a typo in it"

Workaround

The only workaround is to select Remove all spaces and then reassign the guest to the desired space