What does my error mean by expecting table but got Instance?

the local script

local remote = game.ReplicatedStorage.Roll
local ls = game.Players.LocalPlayer.leaderstats:WaitForChild("Rolls")

game.ReplicatedStorage.Roll.OnClientEvent:Connect(function()
	for _, v in pairs (ls) do
		if v:IsA("IntValue") then
			v.Value += 1
		end
	end
	ls.Value = ls.Value + 1
end)

error on line 5: invalid argument #1 to 'pairs' (table expected, got Instance)????

Problem

You are attempting to iterate through an Instance instead of the required table.

The error itself means you are providing an Instance where you should be providing a table. The error also provides a location as to where you are providing an Instance instead of a table (line 5).

Solution

In your situation, using the :GetChildren() or :GetDescendants() methods will solve your issue as both of these methods return tables.

Code

local remote = game.ReplicatedStorage.Roll
local ls = game.Players.LocalPlayer.leaderstats:WaitForChild("Rolls")

game.ReplicatedStorage.Roll.OnClientEvent:Connect(function()
    for _, v in pairs (ls:GetChildren()) do -- Added :GetChildren()
        if v:IsA("IntValue") then
            v.Value += 1
        end
    end
    ls.Value = ls.Value + 1
end)

Conclusion

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