Attempt to perform arithmetic on upvalue 'time' (a table value)?

Hi, I used some code in Sceleratis's Kohl Admin Epix Edition script to make a script that would insert a GUI into all players' PlayerGui, show a message, and close the message, using the same code that does the ":sm " command of the Kohl Admin script.

When I extracted the code and tested it, the GUI inserts into the players' PlayerGui, and shows the message, but the message refuses to close; displaying this error:

08:23:24.223 - Workspace.Kohl Epix MSG:85: attempt to perform arithmetic on upvalue 'time' (a table value)

This is the line the error is pertaining (Line 12)

if scroll then 
    if not time then 
        for i = 1, #str do msg.Text = msg.Text .. str:sub(i,i) 
            wait(1/19) 
        end 
        wait(2.5) 
    else 
        for i = 1, #str do 
            msg.Text = msg.Text .. str:sub(i,i) 
            wait(1/19) 
        end 
        wait(time-(#str/19)) 
    end
elseif not time then 
    msg.Text = str 
    wait((#str/19)+2.5) 
else 
    msg.Text = str 
    wait(time) 
end

This is the full script, for further reference:

local set={
    ['PrimaryColor'] = Color3.new(0,0,0); --Primary GUI Color (Default black) (Remember, each 1 translates to a 255, keep that in mind when changing colors, use things like 124/255 to get the color you want)

    ['SecondaryColor'] = Color3.new(1,1,1); --Secondary GUI Color (Default white)

    ['Font'] = 'SourceSansBold'; --Font

    ['TextColor'] = Color3.new(1,1,1); --Text Color (Default white)

    ['TextStrokeTransparency'] = 0; --Text Stroke Transparency (0-1)

    ['TextStrokeColor'] = Color3.new(0,0,0); --Color of the text stroke around letters (Default black)

    ['Transparency'] = 0.5; --Main GUI Transparency (0-1)

    ['Animations'] = true; --Determines if to animate stuff or not

    ['MessageAnimations'] = true; --Same as above but specifically for messages
}

set.GuiName=tostring(math.random(10000000,99999999))
_G['Hint']=function(msg,ptable) set.Hint(msg,ptable) end
_G['Message']=function(title,msg,ptable) set.Message(title,msg,true,ptable) end

local localplayer=game:service('Players').LocalPlayer

set.Message=function(ttl, str, scroll, time)
local v=localplayer
if v and v:findFirstChild("PlayerGui") then
coroutine.wrap(function()
local scr = Instance.new("ScreenGui") scr.Name = set.GuiName.."MessageGUI"
local bg = Instance.new("Frame", scr) 
bg.Name = "bg" 
bg.BackgroundColor3 = set['PrimaryColor'] 
bg.BorderSizePixel = 0 
bg.BackgroundTransparency = 0
bg.Size = UDim2.new(1,0,1,0) 
bg.Position = UDim2.new(0,0,-1,0)--UDim2.new(-1,0,1,0)
bg.ZIndex = 8
local title = Instance.new("TextLabel", bg) 
title.Name = "title" 
title.BackgroundTransparency = 1 
title.BorderSizePixel = 0 
title.Size = UDim2.new(1,0,0,10) 
title.Position = UDim2.new(0,0,0,20)
title.ZIndex = 9 
title.Font = set.Font 
title.FontSize = "Size36" 
title.Text = ttl 
title.TextYAlignment = "Top" 
title.TextColor3 = set['TextColor']
title.TextStrokeColor3 = set['TextStrokeColor'] 
title.TextStrokeTransparency=set.TextStrokeTransparency
local msg = title:clone() 
msg.Parent = bg
msg.Name = "msg" 
msg.Position = UDim2.new(.0625,0,0) 
msg.Size = UDim2.new(.875,0,1,0) 
msg.Font = set.Font 
msg.Text = "" 
msg.FontSize = "Size24" 
msg.TextYAlignment = "Center" 
msg.TextColor3=set['TextColor']
msg.TextStrokeColor3=set['TextStrokeColor']
msg.TextWrapped = true
bg.ClipsDescendants=true
bg.BackgroundTransparency=set.Transparency
scr.Parent = v.PlayerGui
if set.Animations and set.MessageAnimations then
    bg:TweenPosition(UDim2.new(0,0,0,0),'Out','Quad',1,false)
else
    bg.Position=UDim2.new(0,0,0,0)
end
if scroll then 
    if not time then 
        for i = 1, #str do msg.Text = msg.Text .. str:sub(i,i) 
            wait(1/19) 
        end 
        wait(2.5) 
    else 
        for i = 1, #str do 
            msg.Text = msg.Text .. str:sub(i,i) 
            wait(1/19) 
        end 
        wait(time-(#str/19)) 
    end
elseif not time then 
    msg.Text = str 
    wait((#str/19)+2.5) 
else 
    msg.Text = str 
    wait(time) 
end
local moved=false
local function move()
if not scr then return end
if set.Animations and set.MessageAnimations then
    bg:TweenPosition(UDim2.new(0,0,1,0),'Out','Quad',1,true,function() moved=true scr:Destroy() end)
else
    bg.Position=UDim2.new(1,0,1,0)
end
wait(1.1)
if not moved then move() end
end
pcall(move)
wait(0.3)
pcall(move)
pcall(function() wait(1) scr:Destroy() end)
end)()
end
end

set.RemoveMessage=function()
local v=localplayer
for q,ms in pairs(v.PlayerGui:children()) do
if ms.Name == set.GuiName.."MessageGUI" then
ms:Destroy()
elseif ms.Name == set.GuiName.."HintGUI" then
ms:Destroy()
end
end
end

set.Message("SYSTEM MESSAGE", "Hello.", true, game:service('Players'):children())