Missing method exception on Build

[Joebu]

dotnet 3.0.100-preview6-012264
BlazorExtensions 0.1.9
im using serverside blazor
Im getting this error on init
var connection = _hubConnectionBuilder .WithUrl("/hubs/ChatHub", opt => { opt.LogLevel = SignalRLogLevel.Trace; opt.Transport = HttpTransportType.WebSockets; }).Build();

System.MissingMethodException: Method not found: 'Void Microsoft.JSInterop.DotNetObjectRef..ctor(System.Object)'. at Blazor.Extensions.HubConnection..ctor(IJSRuntime runtime, HttpConnectionOptions options) at Blazor.Extensions.HubConnectionBuilder.Build()

[djinnet]

The reason for that error is because of the current build are using the old version to create DotNetObjectRef.
There is a pull request that has the updated version of making the DotNetObjectRef.
#35

But if I recall, this extension is for the asp.net core hosted version and not for serverside version. Unless someone already got a working sample of serverside blazor to prove me wrong.
I would suggest using the normal signalR version for serverside blazor.

[galvesribeiro]

The preview7 package was published. Please try it out.