There may be many reasons for one or more players to block this problem in Left 4 Dead 2. Players use weapon mods that modify data, or mods with script files, which may cause one or more players to block this problem. .
1. Players use weapon mods that modify data , such as reload action time and bullet damage.
2. Or mods with script files , which may cause this problem due to one or more players being blocked.
3. Players have done some research on vpk unpacking and used GCFScape to unpack to see whether the vpk contains scripts files .
4. If so, it may be caused by this mod.
5. In addition, a friend’s test is required to complete the troubleshooting.
6. Players have used some mods that can be used normally without problems such as crashing or being unable to enter the room.
7. Most of these mods are music, background, murals, etc. They will only replace the textures in the game, so as long as the author completes the production normally, there will be no problem.
8. The player has performed operations on the console, such as deleting sv_allow_lobby_connect_only 1, which may result in the inability to join a friend's creation session.