How can i get a player from a table and have a gui popup?

I want to get a random player from a table and have a GUI popup for that random player

example:

table.insert(playersPlaying,plr.UserId)

local randomPlayerFromTable = playersPlaying[math.random(1,#playersPlaying)]

randomPlayerFromTable.PlayerGui.RandomGui.Frame.TextLabel.Visible = true

How would I make this possible?

Any help is appreciated thanks.

edit: Actual code

for i,player in pairs(game.Players:GetPlayers()) do -------
			
			local char = player.Character or player.CharacterAdded:wait()
			if char then
				local randomSpawns = map.Spawns:GetChildren()[Random.new():NextInteger(1,#map.Spawns:GetChildren())]
				if cachedSpawns[randomSpawns] then
					repeat randomSpawns = map.Spawns:GetChildren()[Random.new():NextInteger(1,#map.Spawns:GetChildren())] wait() until not cachedSpawns[randomSpawns]
				end
				table.insert(playersPlaying,player.UserId)
				print(player.Name)
 			     cachedSpawns[randomSpawns] = true
--teleporting players to spawn location
				for a,b in pairs(playersPlaying) do
       				 char.HumanoidRootPart.CFrame = (randomSpawns.CFrame * CFrame.new(0,2.25,0)) 
				end
				local inGame = false
				
				local status = Game.Stats.Status
				local gameTime = Settings.gameTimeLimit
			end
		end
				local status = Game.Stats.Status
				local gameTime = Settings.gameData.gameTimeLimit
				
				local murdererWeapon = game.ServerStorage.Weapons.Knifes.Knife
				local plrs = game.Players
				local innocents = {}
				
				while wait() do
				      inGame = true
					  repeat
					     gameTime = gameTime - 1
					     status.Value = gameTime.." "..((gameTime == 1 and "Second") or "Seconds").." left."
					     wait(1)
					  until gameTime == 0  
					break
			    end
				
				local rgbMurderer = {161, 16, 18}
				local rgbPychic = {132, 0, 198}
				local rgbInnocent = {0, 184, 0}
				local theChosenOne = playersPlaying[math.random(1,#playersPlaying)]
					theChosenOne.PlayerGui.Role.Main.Visible = true -- this is where I get the error

Excuse the messy code.