Lag or crash issues may occur in the following cases:
1. If the network connection is unstable
2. If there is a conflict with other programs
3. If the computer is infected with a virus or malware
4. If the device specifications are lower than the game's requirements
[Temporary Solutions for Crash Issues]
1. Close all running programs except for The First Descendant
2. If using a router, connect your computer directly to the network with a LAN cable
3. Update or perform a detailed scan with your antivirus program to remove any viruses or malware