why can't i save a dictionary to data store??

This is the saving script. I was just testing if dictionary could be saved, but no. So when the player leaves, I try to save that dictionary into the player's data store.

I looked through mutiple forums but couldn't seem to find the issue

You can ignore the pixeloins save service thing, its just a currency in the game

game.Players.PlayerRemoving:Connect(function(player)
    if game:GetService("RunService"):IsStudio() then return end
    local Pets = {
        Pet1 = {
            Name = "Slimee",
            Attack = 10
        }
    }

local success, failure = pcall(function()
        PixeloinsSaveService:SetAsync(player.UserId.."-pixeloins",player.leaderstats.Pixeloins.Value)
        PetSaveService:SetAsync(player.UserId.."-pets",Pets)
    end)

When player is added:

local pixeloinsData
    local petData
    local success, failure = pcall(function()
        pixeloinsData = PixeloinsSaveService:GetAsync(player.UserId.."-pixeloins") --this works
        petData = PetSaveService:GetAsync(player.UserId.."-pets") -- this doesn't...
    end)

    if success then
        pixeloins.Value = pixeloinsData
                print(PetSaveService:GetAsync(player.UserId.."-pets")["Pet1"])
        else end

WHen I print the dictionary, ServerScriptService.PlayerScript:60: attempt to index nil with 'Pet1', so it means that nothing is saved at all... Over here, it's line 10, not line 60

Please help to figure out a way to save the dictionary, all help is appreciated.

Thank you!

[EDIT] So i went on another experience(game), then I tried to save dictionaries (again) and THIS TIME IT PRINTED GIBBERISH this time ill just post the full script

NOTE: THIS IS A COMPLETELY DIFFERENT GAME UNRELATED TO THE ONE ABOVE

local DSS = game:GetService("DataStoreService")
local TDS = DSS:GetDataStore("TableDataStore")

game.Players.PlayerAdded:Connect(function(player)


    local f = Instance.new("Folder")
    f.Name = "F"
    f.Parent = player

    for i = 1,3 do
        local folder = Instance.new("Folder")
        folder.Parent = f
        folder.Name = tostring(i)
        if i == 2 or i == 3 then
            local nf = Instance.new("IntValue")
            nf.Value = 69
            nf.Parent = folder
        end
    end

    local data
    local s, e = pcall(function()
        data = TDS:GetAsync(player.UserId.."-table")
    end)
    if s then
        print(data) --printed 0x8491f and a ton of gibberish what that mean
--also when i change it to unpack data it prints out nothing
    end
end)
game.Players.PlayerRemoving:Connect(function(player)
    local ffolder = player.F

    local save = {}
    for i = 1,#(ffolder:GetChildren()) do
        save[tostring(i)] = {
            Name = ffolder[i].Name
        }
        if ffolder[i]:FindFirstChildWhichIsA("IntValue") then
            save[tostring(i)]["Val"] = ffolder[i]:FindFirstChildWhichIsA("IntValue").Value
        end
    end
    local s, e = pcall(function()
        TDS:SetAsync(player.UserId.."-table", save)
    end)
    if s then end
end)

pls help i've been working on this for 3 milion years its giving me headaches and migranes