NullReferenceException when Attempting to Configure Managed Accounts

  While attempting to visit Configure managed accounts (ManagedAccounts.aspx) in a SP2013 farm today, I got a correlation ID and the tip of the NRE iceberg: “Object reference not set to an instance of an object.”     Here’s what the salient part of the ULS logs looked like. . .   10/14/2014 15:47:12.42  w3wp.exe…

2