It's possible this one applies.
https://support.microsoft.com/en-us/kb/3118750
or if the list is somehow corrupt you could probably delete it and start over. This one may help you rebuild it.
http://blogs.technet.com/b/keithmayer/archive/2013/08/06/step-by-step-using-powershell-to-add-servers-to-server-manager-in-windows-server-2012.aspx
--please don't forget to upvote and Accept as answer if the reply is helpful--