Firebase only works on Unity Editor and on pC does not work on Android

Can anyone tell me, what's going wrong? It works only in Unity Editor.
When buildo for android, it doesn't work, but it doesn't report any kind of error. When testing on the pc works normally.

public void CadastrarPorEmail()
    {
        email = _textEmail.text;
        password = _texSenha.text;


        auth.CreateUserWithEmailAndPasswordAsync(email, password).ContinueWith(task =>
        {
            if (task.IsCanceled)
            {
                _imgDeAvisos.SetActive(true);
                _textAviso.text = "Erro ao criar usuário: " + task.Exception;
                Debug.LogWarning("CreateUserWithEmailAndPasswordAsync was canceled.");
                return;
            }
            if (task.IsFaulted)
            {
                Debug.LogWarning("CreateUserWithEmailAndPasswordAsync encountered an error: " + task.Exception);
                _imgDeAvisos.SetActive(true);
                _textAviso.text = "Erro ao criar usuário: " + task.Exception;
                return;
            }

            // Firebase user has been created.
            Firebase.Auth.FirebaseUser newUser = task.Result;
            Debug.LogFormat("Firebase user created successfully: {0} ({1})", newUser.DisplayName, newUser.UserId);
            _imgDeAvisos.SetActive(true);
            _imgDeAvisos.GetComponent<Image>().color = new Color32(0, 185, 156, 100);
            _textAviso.text = " Cadastro Criado com sucesso !" + newUser.DisplayName + newUser.UserId; 

            //Send Emails Verification
            newUser.SendEmailVerificationAsync().ContinueWith(t => {
            Debug.Log("Verifique o seu e-mail");
            });
        });
    }