Error Request Mail

Question

Could someone give me a hand here? I’m doing an environment check to send a certain email, only the following error is occurring.

Could you tell me how to fix this? My code is below

public void NovoEventoAdverso(int patientId, int hospitalId, int usuarioId)
{
    var cadastroRepository = new CadastroRepository();
    var investigadorRepository = new UsuarioRepository();
    var randomizacaoRepository = new RandomizacaoRepository();

    var paciente = cadastroRepository.GetByPatientId(patientId, hospitalId);
    var investigador = investigadorRepository.GetbyId(usuarioId);
    var randomizacao = randomizacaoRepository.GetByPatientId(patientId, hospitalId);

    var isHomolog = Request.Url.AbsoluteUri.Contains("homolog") || Request.Url.AbsoluteUri.Contains("localhost") ? true : false;


    MailMessage objEmail = FactoryMailMessage();

    objEmail.To.Add("AAAA BBBB <[email protected]>");

    objEmail.Subject = $"Novo Evento Adverso - {paciente.inpac}";

    var conteudo = "Novo Evento Adverso cadastrado:<br />";
    conteudo += $"Iniciais do Paciente: {paciente.inpac}<br />";
    conteudo += $"Nome do Investigador: {investigador.Nome}<br />";
    conteudo += $"Data da Randomização: {randomizacao.RandomizacaoData.Value.ToString("dd/MM/yyyy")}<br />";
    conteudo += $"Data do Preenchimento: {DateTime.Now.ToString("dd/MM/yyyy HH:mm:ss")}";

    objEmail.Body = conteudo;

    EnviarEmail(objEmail);
}