What is causing FontLibrary to not work? [Still Unanswered]

I have recently found a script that will allow me to upload custom fonts and load them into scripts that I already have. I'm currently trying to incorporate this into my rank gui script, but for some reason it isn't working. I followed the tutorial in trying to add it, but it just doesn't want to work. My lua knowledge isn't all that great either.

Edit: I was able to get rid of the errors, but now I'm left with new errors.

Message from output(Updated): 03:27:26.479 - Can't parse JSON 03:27:26.480 - Script 'ServerScriptService.FontLibrary', Line 99 - method LoadFont 03:27:26.480 - Script 'ServerScriptService.Rank Script', Line 9 03:27:26.481 - Stack End

Line 99:

local data = web:JSONDecode(info.Description)

Whole Function:

function class:LoadFont(id)
    local info = market:GetProductInfo(id)
    local data = web:JSONDecode(info.Description)
    data.image = "rbxassetid://"..id
    if not data.padding then
        data.padding = 0
    end
    if not class.Fonts[data.name] then
        class.Fonts[data.name] = {}
    end
    class.Fonts[data.name][data.size] = data
    return data
end

Line 9:

FontLibrary:LoadFont(325279010)

Font Script: http://www.roblox.com/FontLibrary-item?id=245048459

Video Explaining the usage: https://www.youtube.com/watch?v=LrwMIQwqNhA

Current Script:

local ServerStorage = game:GetService("ServerStorage")
local FontLibrary = require(script.Parent:WaitForChild("FontLibrary"))
local ExtendedTextLabel = require(script.Parent:WaitForChild("FontLibrary"):WaitForChild("ExtendedTextLabel"))
local Color = Color3.new(192/255, 192/255, 192/255)
FontLibrary:LoadFont(325279010)

game.Players.PlayerAdded:connect(function(plr)
plr.CharacterAdded:connect(function() -- So a new character is in use.
    local rank = plr:GetRankInGroup(2696373)
    local role = plr:GetRoleInGroup(2696373)

    if rank ~= 0 then
        local Label = ExtendedTextLabel.new(ServerStorage.Rank.TextLabel)
        repeat wait() until plr.Character
        Label.Parent = plr.Character.Head
        Label.Text = role
        Label.TextColor3 = Color
        Label.Font = "ComicSansMS"
        Label.FontSize = 12
    end
end)
end)