Xamarin.Forms signalr client getting Method not found: Microsoft.AspNetCore.Http.Connections.NegotiationResponse Microsoft.AspNetCore.Http.Connections.NegotiateProtocol.ParseResponse(System.ReadOnlySpan`1<byte>) when trying to connect

Question

I have a Xamarin.Forms 5.0 application, we are using the Microsoft.AspNetCore.SignalR.Client 5.0.4 nuget package. On UWP the client connects just fine but the same code on iOS gets the error Method not found: Microsoft.AspNetCore.Http.Connections.NegotiationResponse Microsoft.AspNetCore.Http.Connections.NegotiateProtocol.ParseResponse(System.ReadOnlySpan`1<byte>)

Any ideas?