Message embed field values must be non-empty strings - discord.js

Question

https://pastebin.com/FWYFSdfD
const Discord = require('discord.js')
module.exports = {
name: 'warn',
description: 'warn a member',
async execute(message, args){
edited = message.content.slice(5);
const guildID = message.guild.Discord
const UserId = message.member.Discord
const Reason = args.splice(1).join('')
let User = message.mentions.users.first()
if(message.member.permissions.has('KICK_MEMBERS')){
try{
member = await message.guild.members.find(message.mentions.users.first())
}catch(err){
const warnEmbed = new Discord.MessageEmbed()
.setTitle("**Warn**")
.setColor("#FF0000")
.addField('text', 'value')
.addField("User:", User, true)
.addField("Reason:", Reason, true)
.setThumbnail("https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRGagFW_bh2AfgI1BqAis81CXVg37j8_MKtwg&usqp=CAU")
.setTimestamp()
}
try{
User.send(warnEmbed)
message.channel.send(warnEmbed)
}
catch(err){
return(message.reply('You must format the command <#mention> <reason>'))
}
}
else{
message.channel.send('only staff can use this command')
}
}
}
This is the warn code. But when I try to use it, I get an error saying MessageEmbed field values must be non-empty strings. And how many words do I need to write to send this.