playdate.timer.updateTimers() attempting to index a nil value

SDK Get Help
1

Hello!

This is my first time developing for the playdate and I’m having trouble with updateTimers().

Whenver i try to call updateTimers() from the update function, it always spits out this error message

main.lua:43: attempt to index a nil value (field 'timer')
stack traceback:
	main.lua:43: in function <main.lua:38>

and if I don’t use updateTimers() my game just freezes.

here are revelvant bits of code

local pd = playdate
local gfx = pd.graphics

...
...
...

local isTalking = false
local textToWrite = {}
local textboxImg = gfx.image.new("assets/ui/textbox.png")
local textboxSImg = gfx.image.new("assets/ui/textbox_small.png")

function playdate.update()
    if(isTalking == false) then
        gfx.clear()   
    end
    
    pd.timer.updateTimers()

    if (gfx.font ~= GBFont) then
        gfx.setFont(GBFont)
    end
    
    ...
    ...
    more code
    
end

function Talk()
    print("talking!")
    isTalking = true
    Co = coroutine.create(function()

        pd.timer.new(100,NextCharacter)

        textToWrite = { "Hi! I'm soda! It's nice\nto meet you!", "Woah! Im on the playdate??" }
        if(textboxSImg ~= nil) then
            for i = 1, #textToWrite, 1 do
                print(textToWrite[i])
                for c = 1, string.len(textToWrite[i]), 1 do
                    textboxSImg:draw(100, 156)
                    print(string.sub(textToWrite[i],1,c))
                    gfx.drawText(string.sub(textToWrite[i],1,c), textPosX, textPosY)
                    coroutine.yield()
                end
                
                coroutine.yield()
            end
        isTalking = false
        end
    end)

    coroutine.resume(Co)

end

function NextCharacter()
    coroutine.resume(Co)
end

my goal for this is for game to wait just a second so the characters to type themselves out one-by-one. it’s currently too fast and just displays all at once

any help would be appreciated!

running SDK v3.0.6 on Linux Mint

EDIT: I’m stupid, I just had to import CoreLibs/timer