Why is point service always "unavailable"?

My friend has ran into this error 6 times. This is his script:

local PointsService = Game:GetService("PointsService")
while wait() do
script.Parent.Text = tostring(PointsService:GetAwardablePoints()) .. " points to award."
print(tostring(PointsService:GetAwardablePoints()))
end

I would appreciate any help. Thanks!