Issues connecting to Tentacle

I am trying to configure deployment target (OS Windows Server 2012) on my Octopus Server (OS Windows Server 2008). I have the latest Octopus Server & Octopus Tentacle installed. I get the following error while configuring the deployment target.

Octopus v2018.4.0

Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
Halibut.HalibutClientException
at Halibut.Transport.DiscoveryClient.Discover(ServiceEndPoint serviceEndpoint)
at Octopus.Server.Web.Api.Actions.MachineDiscovery.TentacleDiscovery.Discover(String host, Int32 port, ProxyDetails proxy)
at Octopus.Server.Web.Api.Actions.DiscoverMachineResponder.Discover(String host, Int32 port, Nullable1 discoverableEndpointType, ProxyDetails proxyDetails) at Octopus.Server.Web.Api.Actions.DiscoverMachineResponder.ExecuteRegistered() at Octopus.Server.Web.Infrastructure.Api.Responder1.Respond(TDescriptor options, NancyContext context)
at System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)
at Octopus.Server.Web.Infrastructure.OctopusNancyModule.<>c__DisplayClass14_0.<get_Routes>b__1(Object x)
at Nancy.Routing.Route.<>c__DisplayClass4.b__3(Object parameters, CancellationToken context)

–Inner Exception–
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
System.IO.IOException
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
at Halibut.Transport.DiscoveryClient.Discover(ServiceEndPoint serviceEndpoint)

–Inner Exception–
An existing connection was forcibly closed by the remote host
System.Net.Sockets.SocketException
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)

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