[Bug] Problema ao retornar por nome

Boa tarde, estou com problema ao concluir a Aula 2-6 do curso (.NET: criando uma API Web com ASP.NET Core) onde recebo o erro de objeto nulo, porem o listar funciona perfeitamente ainda com artista sem musica

Listar Porem ao usar o RecuperarPor

• Rota: https://localhost:7157/Artistas/djavan
• Repo: https://github.com/marcel0liveira/Alura-csharp-screensound-curso-add-entityframework/tree/add-API
• Arquivo: ScreenSound.API > Program.cs
• Trecho:

app.MapGet("/Artistas/{nome}", ([FromServices] DAL<Artista> dal, string nome) =>
{
    var artista = dal.RecuperarPor(x => x.Nome.ToUpper().Equals(nome.ToUpper()));

    if (artista is null)
    {
        return Results.NotFound();
    }
    return Results.Ok(artista);
});

*** Erro:**
System.NotSupportedException: The deserialization constructor for type 'Castle.Proxies.ArtistaProxy' contains parameters with null names. This might happen because the parameter names have been trimmed by ILLink. Consider using the source generated serializer instead.
   at System.Text.Json.ThrowHelper.ThrowNotSupportedException_ConstructorContainsNullParameterNames(Type declaringType)
   at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.PopulateParameterInfoValues(JsonTypeInfo typeInfo)
   at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.CreateTypeInfoCore(Type type, JsonConverter converter, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.GetTypeInfo(Type type, JsonSerializerOptions options)
   at System.Text.Json.JsonSerializerOptions.GetTypeInfoNoCaching(Type type)
   at System.Text.Json.JsonSerializerOptions.CachingContext.CreateCacheEntry(Type type, CachingContext context)
--- End of stack trace from previous location ---
   at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Nullable`1 ensureNotNull, Boolean resolveIfMutable, Boolean fallBackToNearestAncestorType)
   at System.Text.Json.JsonSerializerOptions.GetTypeInfoForRootType(Type type, Boolean fallBackToNearestAncestorType)
   at System.Text.Json.JsonSerializerOptions.TryGetPolymorphicTypeInfoForRootType(Object rootValue, JsonTypeInfo& polymorphicTypeInfo)
   at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.SerializeAsync(Stream utf8Json, T rootValue, CancellationToken cancellationToken, Object rootValueBoxed)
   at Microsoft.AspNetCore.Http.HttpResponseJsonExtensions.WriteAsJsonAsyncSlow[TValue](Stream body, TValue value, JsonSerializerOptions options, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Http.RequestDelegateFactory.ExecuteResultWriteResponse(IResult result, HttpContext httpContext)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

HEADERS
=======
Accept: */*
Connection: keep-alive
Host: localhost:7157
User-Agent: PostmanRuntime/7.35.0
Accept-Encoding: gzip, deflate, br
Postman-Token: 415acd73-28ca-4091-8f82-89b22478bd45