Changing the text of GUI for all players in a server?

I'm a player on ROBLOX who wishes to make a game and have just started on ROBLOX Lua Scripting. I'm not experienced at all and need help.

So I want to make a script that makes the text of TextLabel "TransferRateDisplay" (Path : game.StarterGui.ScreenGui.BottomRightGUI.TransferRateDisplay) to change for all players (to the same value for every player too) in the server after the TimeOfDay reaches midnight for each day.

I've put this script inside the StarterPlayerScripts :

function changeCurrency(a, b, c)
		print("Changing Transfer Rate")
		print(a)
		print(b)
		print(c)
		local TR = game.Workspace.TransferRate.Value
		local TRGui = game.Workspace.Players.LocalPlayer.PlayerGui.ScreenGui.BottomRightGUI.TransferRateDisplay
		local PlusMinus
		local Multiplier
		if (b < 5) then
			Multiplier = 3
		end
		if (b >= 5 or b < 25) then
			Multiplier = 2
		end
		if (b >= 25) then
			Multiplier = 1
		end
		
		if (c == 1) then
			PlusMinus = 1
		end
		if (c == 2) then
			PlusMinus = -1
		end
		if (a < 70) then
			TR = TR + (Multiplier * PlusMinus)
			if (TR < 8) then
				TR = 8
			end
			if (TR > 25) then
				TR = 25
			end
			TRGui.Text = "Transfer Rate : " .. TR .. "Tx / R$"
		else
			--Nothing Happens!
		end
end
while true do
	game.Lighting:SetMinutesAfterMidnight(game.Lighting:GetMinutesAfterMidnight() + 2.4)
	wait(0.1)
	if (game.Lighting:GetMinutesAfterMidnight() < 1 or game.Lighting:GetMinutesAfterMidnight() > 1439) then
		math.randomseed(tick())
		local a = math.random(1,100)
		local b = math.random(1,100)
		local c = math.random(1,2)
		changeCurrency(a, b, c)
	end
end

So I started a local server of one player in my ROBLOX Studio.

The output in my server view was :

13:34:54.928 - Started network server on XXXXXXXX
13:34:54.929 - Started network server on XXXXXXXX
Loaded gloo library. Type _G.gloo.Help() for help.
Loaded CmdUtl plugin (v5.0.0)
13:34:55.258 - Successfully opened file - C:/Users/User/AppData/Local/Roblox/server.rbxl
13:35:01.463 - New connection from XXXXXXXX

13:35:01.531 - Replication: Can't create default object of type Players
Player -1 added

The output in my player view was :

Loaded gloo library. Type _G.gloo.Help() for help.
Loaded CmdUtl plugin (v5.0.0)
13:35:01.460 - ! Joining game '' place 0 at localhost
13:35:01.461 - Connecting to localhost:XXXXXXXX
13:35:02.300 - Connection accepted from XXXXXXXX

Changing Transfer Rate
19
2
1
13:36:09.846 - Players is not a valid member of Workspace
13:36:09.847 - Script 'Players.Player1.PlayerScripts.LocalScript', Line 7 - global changeCurrency
13:36:09.847 - Script 'Players.Player1.PlayerScripts.LocalScript', Line 47
13:36:09.847 - Stack End

The error doesn't lie! You do realize that "Players" isn't actually in workspace, right? So you dogame.Players.LocalPlayer, not game.Workspace.Players.LocalPlayer! If you don't agree, open explorer and see if you have a model called Players in it.

-- Hope I helped.

--PUB1