How to put an avatar thumbnail on an GUI when a UserID is typed?

Hey there, I'm currently making a system so when the player types a UserID it displays the thumbnail of that user's character but I'm getting the error "Argument 1 missing or nil"

This is the code that I'm using:

local text = script.Parent.Text
local Players = game:GetService("Players")

local function update(id)
	local userId = tonumber(id)
	local thumbType = Enum.ThumbnailType.AvatarThumbnail
	local thumbSize = Enum.ThumbnailSize.Size420x420
	local content, isReady = Players:GetUserThumbnailAsync(userId, thumbType, thumbSize)


	local imageLabel = script.Parent.Parent.avatar
	imageLabel.Image = content
end

script.Parent:GetPropertyChangedSignal("Text"):Connect(function()
	update(text)
end)

Help would be appreciated :D

Hey there! Try this.

local Players = game:GetService("Players")

local function Update(UserId)
	if Players:GetNameFromUserIdAsync(UserId) then
		local ThumbnailType = Enum.ThumbnailType.AvatarThumbnail
		local ThumbnailSize = Enum.ThumbnailSize.Size420x420
		
		local Content = Players:GetUserThumbnailAsync(
			UserId,
			ThumbnailType,
			ThumbnailSize
		)
		
		if Content then
			script.Parent.Parent:WaitForChild("avatar").Image = Content
		end
	end
end

script.Parent:GetPropertyChangedSignal("Text"):Connect(function()
	Update(script.Parent.Text)
end)

G'day! :)