Grpc.Core.RpcException: Status(StatusCode="Internal", Detail="Error starting gRPC call. HttpRequestException: Application layer protocol negotiation error was encountered. (localhost:5001) AuthenticationException: Application layer protocol negotiation error was encountered.", DebugException="System.Net.Http.HttpRequestException: Application layer protocol negotiation error was encountered. (localhost:5001)") ---> System.Net.Http.HttpRequestException: Application layer protocol negotiation error was encountered. (localhost:5001) ---> System.Security.Authentication.AuthenticationException: Application layer protocol negotiation error was encountered.

           protected readonly string url = @"https://localhost:5001/"; 
           var channel = GrpcChannel.ForAddress(url, new GrpcChannelOptions { HttpHandler = httpHandler });
            client = new ClientIPC.ClientIPCClient(channel);
            var response = await client!.GetServerStatusAsync(new Empty { });

 public void ConfigureServices(IServiceCollection services)
        {
            services.AddResponseCompression(options => { options.MimeTypes.Concat(new[] { "application/octet-stream", "application/wasm" }); });
    services.AddGrpc(options => { options.EnableDetailedErrors = true; options.ResponseCompressionLevel = CompressionLevel.Optimal; options.ResponseCompressionAlgorithm = "gzip"; });
 services.AddCors(o =>
            {
                o.AddPolicy("CorsPolicy", builder =>
                {
                    builder.AllowAnyOrigin();
                    builder.AllowAnyHeader();
                    builder.AllowAnyMethod();

                    // TODO tighten this up
                    //builder.WithOrigins("localhost:443", "localhost", "YourCustomDomain");
                    // builder.WithMethods("POST, OPTIONS");
                    //builder.AllowAnyHeader();
                    builder.WithExposedHeaders("Grpc-Status", "Grpc-Message","Grpc-Encoding", "Grpc-Accept-Encoding", "X-Grpc-Web", "User-Agent");
                });
            });
}

 public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseWebAssemblyDebugging();
            }

            app.UseHttpsRedirection();

            app.UseResponseCompression();
            app.UseRouting();

            // Must be between UseRouting() and UseEndPoints()
            app.UseCors("CorsPolicy");

            app.UseCookiePolicy();

            app.UseGrpcWeb();
            app.UseBlazorFrameworkFiles();
            app.UseStaticFiles(new StaticFileOptions { FileProvider = app.ApplicationServices?.GetRequiredService<RemoteFileResolver>() });

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapGrpcService<RemoteWebViewService>().AllowAnonymous();
                endpoints.MapGrpcService<ClientIPCService>().EnableGrpcWeb().AllowAnonymous().RequireCors("CorsPolicy");
                endpoints.MapGrpcService<BrowserIPCService>().EnableGrpcWeb().AllowAnonymous().RequireCors("CorsPolicy");
                endpoints.MapGet("/mirror/{id:guid}", Mirror()).ConditionallyRequireAuthorization();
                endpoints.MapGet("/app/{id:guid}", Start()).ConditionallyRequireAuthorization();

                // Refresh from home page i.e. https://localhost/9bfd9d43-0289-4a80-92d8-6e617729da12/
                endpoints.MapGet("/{id:guid}", StartOrRefresh()).ConditionallyRequireAuthorization();

                // Refresh from nested page i.e.https://localhost/9bfd9d43-0289-4a80-92d8-6e617729da12/counter
                endpoints.MapGet("/{id:guid}/{unused:alpha}", StartOrRefresh()).ConditionallyRequireAuthorization();

                endpoints.MapGet("/wait/{id:guid}", Wait()).ConditionallyRequireAuthorization();
                endpoints.MapGet("/test", () => "Hello World!");
                endpoints.MapFallbackToFile("index.html");
            });
        }