Google Play Game Services few questions

Questions
9

Now I test if snapshots work (install game, set new highscore, uninstall game, check if the highscore is previous one). But it doesn’t work :confused:
Logcat : http://prntscr.com/qjajwo
gpgs script file :

local use_saved_games = sys.get_config("gpgs.use_saved_games") == "1"

function callback(self, message_id, message)
	print(message_id)
	pprint(message)
	if message_id == gpgs.MSG_SIGN_IN or message_id == gpgs.MSG_SILENT_SIGN_IN then
		if message.status == gpgs.STATUS_SUCCESS then
			
		end
		if message.status == gpgs.STATUS_FAILED then
			gpgs.login()
		end
		if use_saved_games then
			gpgs.snapshot_open("googledata", true, gpgs.RESOLUTION_POLICY_MANUAL)
		end
	end
end

function init(self)
	msg.post(".", "acquire_input_focus")
	if gpgs then
		gpgs.set_callback(callback)
		gpgs.silent_login()
	end
	if gpgs then
		local bytes, error_message = gpgs.snapshot_get_data()
		if not bytes then
			print("snapshot_get_data ERROR:", error_message)
		else
			print("snapshot_get_data", bytes)
		end
	end
end

function update(self, dt)
	if gpgs then
		if self.is_logged_in ~= gpgs.is_logged_in() then
			self.is_logged_in = gpgs.is_logged_in()
		end
		if use_saved_games then
			if self.snapshot_is_opened ~= gpgs.snapshot_is_opened() then
				self.snapshot_is_opened = gpgs.snapshot_is_opened()
			end
		end
	end
end

function on_message(self, message_id, message, sender)
	if message_id == hash("set_data") then -- lose screen sends this message in init
		if gpgs then
			local success, error_message = gpgs.snapshot_set_data("googledata")
			if not success then
				print("snapshot_set_data ERROR:", error_message)
			end
		end
	end
end

function final(self)
	if gpgs then
		gpgs.snapshot_commit_and_close()
	end
	if gpgs then
		gpgs.logout()
	end
end

I have tried to move gpgs.snapshot_commit_and_close() near the save data, but then, after I lose my game crashes.