Unable to cast dictionary to content

[NolanCYT (Him)]

I am trying to preload all the images in two modules using one function to keep this script clean and optimized. But whenever I attempt to do so, it gives me the error:
10:48:01.985 Unable to cast Dictionary to Content - Client - Loading:100
Here is the code:

local a = 0.0
local b = {Images, SpriteSheets}
for _, image in pairs(b) do
	ContentProvider:PreloadAsync({image},PreloadFailed)
	a = a + 1.0 StatusLabel.Text = ("Loading Images... ("..a..")")
end

What am I doing wrong? And how can I make this work and preload all the assets in both modules using only one function?

[Qin2007]

at b, what is Images or SpriteSheets? arcording to the code you provided they should be rbxassetid s

[karbis]

if Images and SpriteSheets is a table you have to unpack them

local b = {table.unpack(Images),table.unpack(SpriteSheets)}

[NolanCYT (Him)]

Yes they are modules filled with data I want to preload, and like I said my goal is to preload everything in both modules using one function.

[Qin2007]

after you unpack like @karbis says put b directly into ContentProvider:PreloadAsync() no neeed to loop,
that

@NolanCYT

a = a + 1.0 StatusLabel.Text = ("Loading Images... ("..a..")")

can be put into a callback where PreloadFailed is