PostgreSQL Remaining connection slots are reserved error

error slot loginKetuk Penyimpanan → Hapus Cache. Ketuk Penyimpanan → Hapus semua data → Oke (Note: Harus Login Game Ulang); RESTART Perangkat.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