Deserialization of interface types is not supported

When I try to call a Blazor Server ApiController from a Blazor Client:

alpachaAccount = await Http.GetFromJsonAsync(“api/AlpacaAccount”);

I get this exception message:

Deserialization of interface types is not supported.

How do you recommend deserialization into strongly typed variables using C#?

Just use existing .NET SDK that solves all the problems related to Alpaca connection and available on NuGet.

The .NET SDK has worked great in a Blazor server project but doesn’t work in a browser webassembly project.

Just open GitHub issue and I’ll check that we can do for adding WebAssembly (Mono-wasm AFAIU) support