what does attempt to perform arithmetic on field 'Coins' (a nil value) ?

i've lately been receiving this error: attempt to perform arithmetic on field 'Coins' (a nil value) and am not quite sure why

here is the code:

local module = {}
local MarketplaceService = game:GetService("MarketplaceService")
redPlayers = 0
bluePlayers = 0
red = {}
blue ={}
redCount =0
blueCount =0
redTimes = 0
blueTimes = 0


local Rewards = {
	-- won
won={	
	-- first position
	{
	Xp = 40;
	Coins = 45;
	wins = 1
	};

};


--Lost
lost={
	{
	Xp = 30;
	Coins = 35;
	wins = 1
	};	

};

--Tie

tie={

	{
	Xp = 5;
	Coins = 10;
	wins = 0
	};
	
}


};


--[[
	game.Serverstorage.maps.RaceObby has a script in it
	that lsitens for when a player reaches the end, if a player reaches the end, it calls module.add()
--]]

module.add = function(Team,playerName)
	if Team == "red" then
		local function playerExist()
			for i, v in pairs(red) do
				if v == playerName then
					return 'Exist'
				end
			end
		end 
		if playerExist() ~= 'Exist' then
			table.insert(red,#red+1,playerName)
			print("Doesnt exisit")
			--redCount=redCount+1
		end
		redTimes = redTimes+1
	elseif Team=="blue" then
		local function playerExist()
			for i, v in pairs(blue) do
				if v == playerName then
					return 'Exist'
				end
			end
		end 
		if playerExist() ~= "Exist" then
			print("Doesnt exisit")
			table.insert(blue,#blue+1,playerName)
			--blueCount=blueCount+1
		end
		blueTimes = blueTimes + 1
	end
end

--resets the number of players that successfully made it
module.reset = function()
	redPlayers=0
	bluePlayers=0
	--resetting red table
	for i, v in pairs(red) do
		table.remove(red,i)
	--	redCount=redCount-1
	end
	--resetting blue table
	for i, v in pairs(blue) do
		table.remove(blue,i)
	end
	
--	redCount=1
--	blueCount=1
	redTimes=0
	blueTimes=0
	
end



--[[game.ReplicatedStorage.SystemEvents.ObbyResults.PlayerResults:FireClient(game.Players:FindFirstChild("Arsubia12"),{
	Has2xPass =false;
	won = true;
	position=2	
})
]]


local playerInfo = {
Has2X = nil;
Won=nil	
}

-- returns the result

module.give = function()
	for i, v in pairs(red) do
		print(typeof(v).. " red")
	end
	for i, v in pairs(blue) do
		print(typeof(v) .." blue")
	end
	--game.ReplicatedStorage.SystemEvents.CaptureTheFlag.sendResult:FireAllClients(red,blue, blueTimes, redTimes)
	game.ReplicatedStorage.SystemEvents.CaptureTheFlag.sendResult:FireAllClients(red, blue, blueTimes,redTimes)
--	local t=0 
--	for i, v in pairs(red) do
--		t=t+0.5
--	end
--	for i, v in pairs(blue) do
--		t=t+0.5
--	end
--	wait(t+5)
	
	--[[ Rewarding players on red team based on wheather they won or not]]
	for i, player in pairs(red) do
		if game.Players:FindFirstChild(player) then
			local plr = game.Players:FindFirstChild(player)
			local leaderstats = plr:FindFirstChild('leaderstats')
			local xp = plr:FindFirstChild(plr.Name.."'s Xp")
			if leaderstats then
				if redTimes > blueTimes then
					playerInfo.Won=true
					if MarketplaceService:UserOwnsGamePassAsync(plr.UserId,5464669) then
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChils("Coins").Value + (Rewards.won.Coins *2)
						xp:FindFirstChild("Xp").Value = (Rewards.won.Xp*2)
						playerInfo.Has2X = true
					else
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChils("Coins").Value + (Rewards.won.Coins)
						xp:FindFirstChild("Xp").Value = (Rewards.won.Xp)
						playerInfo.Has2X = false
					end
				elseif redTimes < blueTimes then
					playerInfo.Won=false
					if MarketplaceService:UserOwnsGamePassAsync(plr.UserId,5464669) then
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChils("Coins").Value + (Rewards.lost.Coins *2)
						xp:FindFirstChild("Xp").Value = (Rewards.lost.Xp*2)
						playerInfo.Has2X = true
					else
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChils("Coins").Value + (Rewards.lost.Coins)
						xp:FindFirstChild("Xp").Value = (Rewards.lost.Xp)
						playerInfo.Has2X = false
					end
				else
					playerInfo.Won=nil
					if MarketplaceService:UserOwnsGamePassAsync(plr.UserId,5464669) then
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChils("Coins").Value + (Rewards.tie.Coins *2)
						xp:FindFirstChild("Xp").Value = (Rewards.tie.Xp*2)
						playerInfo.Has2X = true
					else
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChils("Coins").Value + (Rewards.tie.Coins)
						xp:FindFirstChild("Xp").Value = (Rewards.tie.Xp)
						playerInfo.Has2X = false
					end	
				end
			end
			if leaderstats then
				game.ReplicatedStorage.SystemEvents.CaptureTheFlag.PlayerResults:FireClient(plr, playerInfo)
			end
			playerInfo.Has2X=nil
			playerInfo.Won=nil
		end--FindFirstChild(player)
	end; -- for i, v in pairs(red) do
	
	
	------------------------------------------------------------------------------------------------------
	for i, player in pairs(blue) do
		if game.Players:FindFirstChild(player) then
			local plr = game.Players:FindFirstChild(player)
			local leaderstats = plr:FindFirstChild('leaderstats')
			local xp = plr:FindFirstChild(plr.Name.."'s Xp")
			if leaderstats then
				if redTimes > blueTimes then
					playerInfo.Won=true
					if MarketplaceService:UserOwnsGamePassAsync(plr.UserId,5464669) then
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChild("Coins").Value + (Rewards.won.Coins *2)
						xp:FindFirstChild("Xp").Value = (Rewards.won.Xp*2)
						playerInfo.Has2X = true
					else
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChild("Coins").Value + (Rewards.won.Coins)
						xp:FindFirstChild("Xp").Value = (Rewards.won.Xp)
						playerInfo.Has2X = false
					end
				elseif redTimes < blueTimes then
					playerInfo.Won=false
					if MarketplaceService:UserOwnsGamePassAsync(plr.UserId,5464669) then
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChils("Coins").Value + (Rewards.lost.Coins *2)
						xp:FindFirstChild("Xp").Value = (Rewards.lost.Xp*2)
						playerInfo.Has2X = true
					else
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChild("Coins").Value + (Rewards.lost.Coins)
						xp:FindFirstChild("Xp").Value = (Rewards.lost.Xp)
						playerInfo.Has2X = false
					end
				else
					playerInfo.Won=nil
					if MarketplaceService:UserOwnsGamePassAsync(plr.UserId,5464669) then
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChild("Coins").Value + (Rewards.tie.Coins *2)
						xp:FindFirstChild("Xp").Value = (Rewards.tie.Xp*2)
						playerInfo.Has2X = true
					else
						leaderstats:FindFirstChild("Coins").Value = leaderstats:FindFirstChild("Coins").Value + (Rewards.tie.Coins)
						xp:FindFirstChild("Xp").Value = (Rewards.tie.Xp)
						playerInfo.Has2X = false
					end	
				end
			end
			if leaderstats then
				game.ReplicatedStorage.SystemEvents.CaptureTheFlag.PlayerResults:FireClient(plr, playerInfo)
			end
			playerInfo.Has2X=nil
			playerInfo.Won=nil
		end--FindFirstChild(player)
	end; -- for i, v in pairs(red) do
	
	
			
module.reset()
end;-- function

return module