Dictionary is not allowed in DataStore??

What do I need to add to remove this error? Seems to break at the DS:GetAsync

Pieces of the main script posted below; bare with me i'm new to this..

local DS = game:getService("DataStoreService"):GetOrderedDataStore("Stats")


game.Players.PlayerAdded:connect(function(player)
    local Data = script.Data:Clone()
    Data.Parent = player
    local CopyData = script.Data.leaderstats:Clone()
    CopyData.Parent = player
    --stat() 
    if DS then
        local Stats = DS:GetAsync(player.userId);-- find old save
        if Stats then
            for _,Type in next,Data:GetChildren()do
                for _,S in next,Type:GetChildren()do
                    if Stats[S.Name]then
                        S.Value = Stats[S.Name]
                    end
                end
            end
        end
    end

    player.CharacterAdded:connect(function(char)    
    if char:WaitForChild("Humanoid") then
        update()    
        Insert_FallDmg(char); -- Enables Damage_On_Fall
        Insert_Ragdoll(char); -- Enables Death_Animation
        Insert_Blood(char);
        Insert_Sprint(char);
        wait(1) 
        Change_Clothes(char);
        CheckBadges(player)
        if isAuthenticated(player) then
        print(player.Name .. " has bought the game pass with id " .. passId)
        game.ReplicatedStorage.Weapons.M1014:Clone().Parent = player.Backpack
        player.Data.Inventory.M1014.Value = 1
        char.Humanoid.MaxHealth = char.Humanoid.MaxHealth + 50
        char.Humanoid.Health = char.Humanoid.Health + 50
        end
    end
    end)    
end)

game.Players.PlayerRemoving:connect(function(player)
    local Data = player:FindFirstChild("Data")
    local Stats = {}
    if Data then
        for _,Type in next,Data:GetChildren()do
            for _,S in next,Type:GetChildren()do
                Stats[S.Name] = S.Value
            end
        end
    end
    if DS then
        DS:SetAsync(player.userId,Stats)
    end
end)