Unable to make a connection between trivial C# gRPC client and server

Similar to Matěj Zábský I was struggling with "Stream removed" error and failed to get my BloomRPC to call my code. My circumstances were slightly different - my server portion was written with new Grpc.AspNetCore NuGet package in .NET Core 3, where as client was using a Grpc.Core Nuget package (that is compatible with older .NET Frameworks). To get it fixed, on Server side of gRPC I've made this change (I hope this helps someone):

From:

public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
        .ConfigureWebHostDefaults(webBuilder =>
        {
            webBuilder.UseStartup<Startup>();
        });

To:

public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
        .ConfigureWebHostDefaults(webBuilder =>
        {
            webBuilder.ConfigureKestrel(options =>
            {
                // This endpoint will use HTTP/2 and HTTPS on port 5001.
                options.Listen(IPAddress.Any, 5001, listenOptions =>
                {
                    listenOptions.Protocols = HttpProtocols.Http2;
                });
            });

            webBuilder.UseStartup<Startup>();
        });