Black Ops 4 Guide: Fix “Lobby Not Joinable” Error and “Can’t Join Party” Error

Call of Duty: Black Ops 4 players may come across a “Lobby Not Joinable Error” when trying to connect to a match or “Can’t Join Party” when trying to play with their friends. Follow the guide below for a fix.

Both these errors are usually due to a network conflict on the player’s side, below are some troubleshooting tips that could fix them for you.

Black Ops 4 Tips to Fix “Lobby Not Joinable” Error and “Can’t Join Party” Error

Host Problems

Sometimes the party leader or lobby host will have an insufficient Internet connection to host the party or lobby. Try changing them or have another friend host the party or lobby to see if it fixes the problem.

Check the Source

Can other people connect to the party or lobby? If it’s just you then it may be your connection.

Hard Reset 

Hard Reset your console, modem and router and then try again.

Open NAT and Portforwarding/UPnP/DMZ

Check your NAT and make sure it’s Open, you can do this is the game menus or Network Options settings menu.

If your NAT is Moderate or Strict, follow our guide on how to Open NAT for Black Ops 4.

black-ops-4-lobby-party-error-1

This should fix the “Lobby Not Joinable” Error and “Can’t Join Party” Error for you guys in Black Ops 4. If it still doesn’t comment below and I’ll try to help further.

Call of Duty: Black Ops 4 is available now on PC, PS4 and Xbox One.

Danial Arshad Khan

Founder of GearNuke.
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