In the Web Applications Management page of SharePoint Central Administration, the User Policy button is grayed out when the "SharePoint Central Administration v4" application is selected, but this is not the case for any other web application.
The account used to log in is a member of the Farm Administrators group.
I have researched the problem and tried the following solutions:
Run "SharePoint 2013 Central Administration" from the start menu
Run Internet Explorer as Administrator (then go to Central Administration)
Disable UAC
None of these have fixed the problem. Does anyone know how to fix it?
Links to same problem (with solutions):