SetKeepAlive fails on Windows

Can no longer set up a connection to CB on windows. (Windows Server 2012 R2).

Logs:

{{2020-05-12 08:15:00.5050||SdkdConsole.Program|INFO|Starting up SDKD-NET.. }}
{{2020-05-12 08:15:00.6492||SdkdConsole.Program|INFO|SDKD Listening on port 8050 }}
{{2020-05-12 08:15:00.7542||SdkdConsole.Daemon.Control|INFO|Got a new connection. Creating child handle }}
{{2020-05-12 08:15:00.7542||SdkdConsole.Daemon.Control|INFO|Received request: INFO }}
{{2020-05-12 08:15:43.5600||SdkdConsole.Daemon.Control|INFO|Got a new connection. Creating child handle }}
{{2020-05-12 08:15:43.5666||SdkdConsole.Daemon.Control|INFO|Registering handle 101 }}
{{2020-05-12 08:15:43.6175||Sdkd.Client.ClientFactory|INFO|Connection string is couchbase://172.23.99.86 , with creds Administrator:password }}
{{2020-05-12 08:15:43.6880||Couchbase.Core.IO.Connections.MultiplexingConnection|DEBUG|Setting TCP Keep-Alives using SocketOptions - enable keep-alives True, retries 9, time 00:01:00, interval 00:00:01. }}
{{2020-05-12 08:15:43.6880||Couchbase.Core.IO.Connections.MultiplexingConnection|DEBUG|Setting TCP Keep-Alives using SocketOptions - enable keep-alives True, retries 9, time 00:01:00, interval 00:00:01. }}
{{2020-05-12 08:15:43.6955||Couchbase.Core.IO.Connections.MultiplexingConnection|WARN|SetKeepAlive failed (Not Supported): An unknown, invalid, or unsupported option or level was specified in a getsockopt or setsockopt call. }}
{{2020-05-12 08:15:43.6955||Couchbase.Core.IO.Connections.MultiplexingConnection|WARN|SetKeepAlive failed (Not Supported): An unknown, invalid, or unsupported option or level was specified in a getsockopt or setsockopt call. }}
2020-05-12 08:15:43.7178||SdkdConsole.Daemon.Control|ERROR|Unexpected Exception on Run:One or more errors occurred. (The operation is not allowed on non-connected sockets.) The operation is not allowed on non-connected sockets.