IT turns out the fix for this is to upload the ConfigurationUI Package again after you install the upgrade.
After upgrading, when I click on the Groups & Configs tab I get the message: "The requested resource was not found on this server". I can click OK multiple times and the error goes away but if I want to edit a group policy, nonce of the settings pages load.
Upgrade 3.5.1 to 3.5.2 Errors after upgrade