System.AggregateException: 'Some services are not able to be constructed

  public FlightLegAggregatorApi(
      HttpClientFactory httpClientFactory,
      CommonSettings commonSettings,
      FlightLegAggregatorSettings flightLegAggregatorOptions) :
      base(httpClientFactory, commonSettings.ContextHeaderName!)
  {
      this.createFlightLegEndpoint = flightLegAggregatorOptions.FlightLegCreateUri ?? throw new ArgumentNullException(nameof(flightLegAggregatorOptions));
      this.updateFlightLegEndpoint = flightLegAggregatorOptions.FlightLegUpdateUri ?? throw new ArgumentNullException(nameof(flightLegAggregatorOptions));
  }

    public static IServiceCollection RegisterFlightLegCreationServices(this IServiceCollection services, IConfiguration configuration)
    {
        BindSettings<FlightLegAggregatorSettings>(services, configuration, "FlightLegAggregator");
        BindSettings<SolverManagerSettings>(services, configuration, "SolverManager");
        BindSettings<DmnSettings>(services, configuration, "Dmn");
        BindSettings<ReadModelClientSettings>(services, configuration, "ReadModelClient");

        services.AddTransient<HttpClientFactory>();
        services.AddTransient<FlightLegAggregatorApiBase, FlightLegAggregatorApi>();
        services.AddScoped<FlightLegAggregatorServiceBase, FlightLegAggregatorService>();

        return services;
    }