I had a similar issue and this article helped me resolve the issue: https://blogs.msdn.microsoft.com/prashant_upadhyay/2011/09/20/unable-to-expand-server-node-in-the-iis-7-ui-with-shared-configuration/
The issue in my case was the account associated with configurationRedirection was locked, once enabled the issue was resolved.
I guess a similar issue would arise if the account did not have access to the Shared configuration folder, or if the account's password/credentials had changed.