ScreenGui is not a member of PlayerGui??

This error came from two scripts.

1st Script:

wait(1)
while game.ServerScriptService.Playing.AlivePlayers.Value > 0 do		
	local list = workspace.Map.CS:GetChildren()
    m = list[math.random(#list)]
	for i, v in pairs(game.Players:GetChildren())do
		v.PlayerGui.ScreenGui.ColorFrame.Frame.BackgroundColor3 = m.Color
		v.PlayerGui.ScreenGui.ColorFrame.ColorName.Text = m.BrickColor.Name
	end
	wait(7)
	for i, v in pairs(workspace.Map.CS:GetChildren())do
        if v.BrickColor.Name ~= m.BrickColor.Name then
	v.CanCollide = false
	v.Transparency = 0.7
end
	end	
	wait(3)
	for i, v in pairs(workspace.Map.CS:GetChildren())do
	v.CanCollide = true
	v.Transparency = 0
        v.BrickColor = BrickColor.Random()
	end
end
repeat wait(1) until game.ServerScriptService.Playing.AlivePlayers.Value <= 0
game.ServerScriptService.Main.Disabled = true
	for i, v in pairs(game.Players:GetChildren())do
		v.PlayerGui.ScreenGui.ColorFrame.Visible = false
		v.PlayerGui.ScreenGui.TextLabel.Visible = true
		game.ReplicatedStorage.Text.Value = "Nobody Survived!"
	end
	wait(5)
	workspace.Map:ClearAllChildren()
	game.ServerScriptService.Main.Disabled = false
	script.Disabled = true

2nd Script:

local text = game.ReplicatedStorage.Text

while true do
	for i = 25, 0, -1 do
		text.Value = "Next Round in "..i
		wait(1)
	end
	wait(2)
		text.Value = "Picking Gamemode..."	
		wait(5)
		local gamemode = math.random(1)
		if gamemode == 1 then
			game.Lighting.CS:Clone().Parent = workspace.Map
			for i, v in pairs(workspace.Map.CS:GetChildren())do
				if v:IsA("BasePart") then
				v.BrickColor = BrickColor.Random()
				end
			end
			text.Value = "The gamemode will be Color Scramble!"
			wait(3)
			game.ServerScriptService.Playing.AlivePlayers.Value = game.Players.NumPlayers
			for i, v in pairs(game.Players:GetChildren())do
				local list = workspace.Spawns:GetChildren()
                m = list[math.random(#list)]
				v.Character.HumanoidRootPart.CFrame = CFrame.new(m.Position) + Vector3.new(0,5,0)
			end
			wait(2)
			game.ServerScriptService.CSScript.Disabled = false
			for i, v in pairs(game.Players:GetChildren())do
				v.PlayerGui.ScreenGui.TextLabel.Visible = false
				v.PlayerGui.ScreenGui.ColorFrame.Visible = true
			end
			wait(121)
		end
		game.ServerScriptService.CSScript.Disabled = true
			for i, v in pairs(game.Players:GetChildren())do
				v.PlayerGui.ScreenGui.TextLabel.Visible = true
				v.PlayerGui.ScreenGui.ColorFrame.Visible = false
			end
			if game.ServerScriptService.Playing.AlivePlayers.Value > 1 then
				 text.Value = "Multiple people have won!"
			elseif game.ServerScriptService.Playing.AlivePlayers.Value == 1 then
				 text.Value = "One person has won!"
			end
			wait(5)
		game.ServerScriptService.Playing.AlivePlayers.Value = 0
		workspace.Map:ClearAllChildren()
end

is not working in the real game

Error: ScreenGui is not a valid member of PlayerGui

all of these scripts are in a regular script in ServerScriptService.

I'm pretty sure you need to locate the object in the PlayerGui first.

Revised 1st Script lines 5-8

for i, v in pairs(game.Players:GetChildren())do
local gui= v.PlayerGui:FindFirstChild("ScreenGui")
	gui.ColorFrame.Visible = false
	gui.TextLabel.Visible = true
	game.ReplicatedStorage.Text.Value = "Nobody Survived!"
	end

Revised 2nd Script lines 29-32

for i, v in pairs(game.Players:GetChildren())do
local gui = v.PlayerGui:FindFirstChild("ScreenGui")
	gui.TextLabel.Visible = false
	gui.ColorFrame.Visible = true
end

If this doesn't solve your problem, please be more specific in the question you are asking like the error messages coming from it. If it's saying its nil or something.

Also if this doesn't work, make sure you name things in the StarterGui different things if there is more than one ScreenGui.

Think about it. Your browser shows you the images and text and this answer on your computer, not here. The server cannot do that, since your computer's display is on YOUR computer. So, handle UI work on your computer!