Datastore loading but not saving?

Below is my datastore script for when the system saves two variables, 'Points' and 'Wins'. I have previously defined 'dss' as the DataStoreService, 'mds' and 'wds' as DataStores previously created (I know these variables are fine)

game.Players.PlayerAdded:Connect(function(player)
	
	
	local data
	
	local success, errormessage = pcall(function() --LOADING POINTS
		data = mds:GetAsync(tostring(player.UserId.."-points"))
	end)
	if success then
		print("success loading data")
		player:WaitForChild("leaderstats").Points.Value=data
		local check = tostring(data)
		print(check)
	else
		print("Error getting data")
		warn(errormessage)
	end
end)
	
game.Players.PlayerAdded:Connect(function(player)
	local winsdata
	local success, errormessage = pcall(function() --LOADING WINS
		winsdata = wds:GetAsync(tostring(player.UserId.."-wins"))
	end)
		
	if success then
		print("success loading data")
		player:WaitForChild("leaderstats").Wins.Value=winsdata
		local winscheck = tostring(winsdata)
		print(winscheck)
	else
		print("Error getting data")
		warn(errormessage)
	end
end)

These work absolutely fine and load in the variables previously saved just fine. However today when I logged onto studio, my save script suddenly wasn't working.

game.Players.PlayerRemoving:Connect(function(player)
	print("this script has run")
	local success, errormessage = pcall(function()
		print("this pcall also ran")
		mds:SetAsync(player.UserId.."-points",player.leaderstats.Points.Value)
	end)
	
	if success then
		print("Data saved succesfully.")
	else
		print("Error saving data")
		warn(errormessage)
		end
end)

game.Players.PlayerRemoving:Connect(function(player)
	local asuccess, aerrormessage = pcall(function()
		print("this script has run")
		wds:SetAsync(player.UserId.."-wins",player.leaderstats.Wins.Value)
	end)
		
	if asuccess then
		print("Data saved succesfully.")
	else
		print("Error saving data")
		warn(aerrormessage)
		end
end)

In the output, "this script has run" appears twice as it should and so does "this pcall also ran", but there are no "Data saved successfully" or any errormessages at all. Is there a problem with the pcall function returning success? Surely even if it returned nil then the else part would still run? Please help , thanks!