FE Dialog not working on server?

So I'll start off by explaining how I have my Dialog setup; I have the Dialog in an npc's head in the Workspace, the following code is inside a Script inside the Dialog. The script works locally but not on a server. I've been told that I should be handling this locally but I have no idea how I would do so. Any and all help is greatly appreciated!

Edit: I forgot to specify what wasn't working, the print on line 11 and everything following it isn't firing on the server

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local ManipulateStoreEvent = ReplicatedStorage.RemoteEvents:WaitForChild("ManipulateStoreEvent")

local ShopKeeper = script.Parent.Parent.Parent
local Position = ShopKeeper.HumanoidRootPart.CFrame.p
local Dialog = script.Parent
local PlayersUsing = {}

script.Parent.DialogChoiceSelected:Connect(function(Player, DialogChoice)
    if DialogChoice.Name == "Yes" then
        print("Attempting to open " .. Player.Name .. "'s shop")
        ManipulateStoreEvent:FireClient(Player, "Open")
        table.insert(PlayersUsing, Player)
    end
end)

function getPlayerPosition(Player)
    local Character = game.Workspace:FindFirstChild(Player.Name)
    if Character then
        return Character.HumanoidRootPart.CFrame.p
    end
end

function removePlayerFromPlayersUsing(PlayerRemoving)
    for Index, Player in pairs(PlayersUsing) do
        if PlayerRemoving == Player then
            table.remove(PlayersUsing, Index)
        end
    end
end

while wait(0.5) do
    if Dialog.InUse then
        for _, Player in pairs(PlayersUsing) do
            local Magnitude = (Position - getPlayerPosition(Player)).magnitude 
            if Magnitude > Dialog.ConversationDistance then
                print("Attempting to close " .. Player.Name .. "'s shop")
                ManipulateStoreEvent:FireClient(Player, "Close")
                removePlayerFromPlayersUsing(Player)
            end
        end
    end
end