Cannot send an empty messag - embed

const embed = new MessageEmbed()
.setColor('#000033')
.setTitle('Achievements')
.setDescription('Here is a list of all the achievements you have earned.');

let fields = [];
for (const achievement of achievements) {
  const achieved = data[achievement.id] > 0;
  const name = achievement.name;
  fields.push({
    name,
    value: achieved ? 'Achieved' : 'Not achieved'
  })                
}

embed.addFields(fields);
embed.setTimestamp()
embed.setFooter('Generated by Bard - Awelaw');

msg.channel.send({embed});