Cannot connect WSUS server to Patch Manager server

Update services on the patch management server was working today. Then stopped.

I've rebooted both the wsus and patch manager server, but I can no longer see my wsus server or connect when I try the test connection option.

Source: EminentWare.UI.Controls

Exception occurred at 4/13/2016 3:39:24 PM: Source: %ServerName%

Reason: Exception occurred at 4/13/2016 3:39:21 PM. The transaction with JobID: 0b58babf-1b09-4207-97f0-c2ca930c450a-0 appears to have failed to retrieve the requested information. Unable to retrieve information from  %ServerName% for wsusserver

Object:  %ServerName%

Object Type:  %ServerName%

Stack:    at EminentWare.UI.Controls.UpdateServerInformationCommand.GetServerInfo(UpdateServicesServer server)

   at EminentWare.UI.MMC.Controls.UpdateServicesServerNode.GetServerAsyncMethod()