I’m new with NodeJS and I’m trying to send emails with NodeMailer. I have developed my NodeJS code and the POST Request works in ThunderClient, but when I try to send the request from my JS file nothing happens.
What am I doing wrong?:

Thanks for your help!

This is my index.js code:

app.post('/api/send-mail/:nombreEvento/:receptor/:organizador', async function (req, res) {
    const { receptor } = req.params
    const { organizador } = req.params
    const { nombreEvento } = req.params

    const cal = new icalendar.iCalendar();
    const evento = new icalendar.VEvent();

    const inicio = new Date('2024-04-30T10:00:00');
    const fin = new Date('2024-04-30T11:00:00');

    evento.setSummary(nombreEvento);
    evento.setDate(inicio, fin);
    evento.setLocation('Google Meet');
    evento.addProperty('organizer', `MAILTO:${organizador}`);
    cal.addComponent(evento);

    const archivoIcs = cal.toString();

    const result = await transporter.sendMail({
        from: `TRACKWISE ????${process.env.USER_MAIL}`,
        to: receptor,
        subject: "Llamada Agendada",
        text: "Hola!nTienes una nueva llamada agendada",
        attachments: [
            {
                filename: 'evento.ics',
                content: archivoIcs
            }
        ]
    })
    
    console.log({result})
    res.status(200).json({ok: true, message: "Mail Enviado"})
});

And this is my sending mails code in JS:

async function enviarCorreo() {
    const nombreEvento = nomEvento.textContent;
    const receptor = txtMail.value;
    const organizador = mailOrganizador;

    const url = 'http://localhost:3000/api/send-mail/' + encodeURIComponent(nombreEvento) + '/' + encodeURIComponent(receptor) + '/' + encodeURIComponent(organizador);

    console.log(url);
    
    const requestOptions = {
        method: 'POST'
    };

    try {
        const response = await fetch(url, requestOptions);
        console.log("Response", response);
        if (!response.ok) {
            throw new Error('Error en la solicitud: ' + response.status);
        }
        console.log("Response Status", response.statusText);
    } catch (error) {
        console.error("Error al enviar el correo:", error);
    }
}