script.Parent.Touched:Connect(function(hit)
if hit.Parent:FindFirstChild("Humanoid") then
local player = game:GetService("Players"):GetPlayerFromCharacter(hit.Parent)
local plrLeader = player.leaderstats
plrLeader.Tokens = plrLeader.Tokens + 1
end
end)
OUTPUT: attempt to perform arithmetic (add) on Instance and number

2 comments
you can do plrLeader.Tokens.Value += 1 instead of plrLeader.Tokens.Value = plrLeader.Tokens.Value + 1
@YAYYYYUGUY doing it like that can get beginners a bit confused.