Try repairing your game and fix plutonium.

Thats a setting only the server can change.

Capital_Strngth https://forum.plutonium.pw/post/128664
use this method with radmin and /connect ip address

Never mind, the game has gotten fixed for me. It just has the occasional fps spike

same issue here

same problem if u got any solution give me the feed back its like he cant see the server name

Hey! Im having a similar problem with my brother, when he accepts my invite his game crashes, but mine continues running perfectly fine, at first i tought it could have someting to do with the wi fi since we use the same IP adress, by any chance you tried playing on the same IP adress?

ONEsuzuki same here

Do you even have a public IP assigned to your router?

Is the LAN Launcher offline?
Where can I find it?

Yo bro

Xerxes I'm using a non-steam version of the game, installed at D:\ExternalLibrary\Call of Duty - Black Ops 2\
I've tried moving it to a different drive already, as some other users have suggested with a similar issue, but it didn't seem to help. I haven't tried my boot drive though.