Help with custom font module not properly showing the text?

There is a custom font module on GitHub that I am using. Whenever I try to create a text label or anything else, I don't see the label. No errors, and no incorrect function or anything, as it is exactly as listed within the API page.

Keep in mind that I am using a custom font for a REASON, so I can't just go for one of the many fonts that Roblox provides.

I would probably ask that you try and use the module yourself (I know that's the most inconvenient thing possible) in order to figure this out because my tiny brain can't exactly figure it out.

Here is my script (placed directly under StarterGui).

Edit: Ok, I have the GUI popping up, but it doesn't properly show which area of the spritesheet to show, causing it to look really wack. Can anyone help me there?

local Rbx_CustomFont = require(workspace.Rbx_CustomFont.MainModule)

local test = Rbx_CustomFont.Label("ErasDemi")

test.Parent = script.Parent
test.Text = "test"
test.TextSize = 14
test.Size = UDim2.new(0,200,0,50)