Slot Tidak Bisa Dibuka di HP?|HP Error Saat Buka Aplikasi Slot?

error slot loginA slot machine, fruit machine (British English), poker machine or pokey is a gambling machine that creates a game of chance for its customers.This is a first attempt to work with snal slot AFTER I reinstalled my Qt Creator. Since I am adding a slot in device.cpp I do not get why the error is