Black Ops 4 Servers Down, Fatal Error PC, NAT Type, Lobby Not Joinable - Errors Explained

Black Ops 4 Servers Down, Fatal Error PC, NAT Type, Lobby Not Joinable - Errors Explained

In this Call of Duty Black Ops 4 Guides hub we’ve pulled together everything you’ll need to know to get ahead, including a guide to using CoD Points.

With Black Ops 4 now officially out everywhere, players have been sinking their teeth into Treyarch’s latest iteration of the long-running shooter series. And while Black Ops 4 offers silky smooth gameplay, punctuated by great shooting and interesting new modes, things are less than perfect. Since launch, there have been a few prominent issues cropping up in Call of Duty Black Ops 4, issues that can seriously hamper your experience if left unchecked. Luckily for you, we’ve got info on all of the most prevalent Black Ops 4 errors, as well as some advice on how to fix them. We’ll cover Black Ops 4 Servers Down Error, NAT Type Error and Lobby Not Joinable Error.

For more on Call of Duty Black Ops 4, head over to our Black Ops 4 Guides Hub. It’s got plenty of helpful tips on getting better at the game, as well as info on Blackout and Zombies.

Call of Duty Black Ops 4 Errors Explained

Unfortunately, the launch of Black Ops 4 has been less than peachy. There are a few bugs that could put a dampener on your day - from server issues to problems joining lobbies. We’ll be sure to keep this page updated with any major errors that crop up in the future, but for now let’s take a look at what some players have been running into so far.

CoD Black Ops 4 Servers Down

From time to time, especially in the days following launch, you may experience an error message telling you that the Black Ops 4 Servers are down. What you’re going to want to do is head on over to and check whether this is a persistent issue that other players are running into. If everything looks fine, then the issue could be on your end. Just restart your router, and console and check again. If the problem persists, log an error with the support team and they will get back to you. It’s always worth keeping an eye on Twitter and r/blackops4 to see if other users are also having issues, and to see if Treyarch has issued a statement.

CoD Black Ops 4 NAT Type Error

NAT Type errors are a real pain, and seem to pop up in pretty much any game with a multiplayer component. Call of Duty in particular, perhaps because of its high player count, seems to run into NAT Type issues pretty often, but it’s pretty easy to fix. What you’re aiming to do is switch your NAT Type to Open. Here’s how you do it:

  • First off, make sure you’ve disabled or reduced the level of any firewalls on your home router
  • Now, you’ll want to set port forwarding on your router to IP address of the device you’re playing on. To you’ll want to use port 3074 UDP and TCP. More info can be found in this article on the Xbox Support site.
  • Enter your device’s IP address into the DMZ of your router
  • Make sure you’re using an ethernet connection over a wireless one

The steps above should set your NAT Type to open. To check your NAT Type, go to the multiplayer menu, select Options, and then System Info.

Call of Duty Black Ops 4 Lobby Not Joinable Error

One of the more common Black Ops 4 bugs that you could run into is the Black Ops 4 Lobby Not Joinable Error. It’s an annoying issue that is even more so if you’re trying to get into a lobby with friends. There are some things you can do to try and fix it though, which we’ve detailed below.

  • Restart your game, it could be an instance error that will be fixed by re-logging into the online servers.
  • Your NAT Type might be closed (see the steps above)

Black Ops 4 Error 897625509 - Fatal Error PC Fix

Some unfortunate Black Ops 4 PC players have been running into a nasty bug the last week or so. It's called Fatal error Error Code: 897625509, and it can completely stop you being able to play the game. We have some error 897625509 fixes below:

  • Head into the desktop app
  • From the drop down OPTIONS menu select "Scan and Repair"
  • If this doesn't work, try reinstalling and updating Nvidia drivers

Jake Green

Guides Editor

Jake is a former freelance writer who now heads up guides for USG. He spends his days dreaming of an X-Files dating-sim and will play literally any game with monkeys in it. He has an unhealthy obsession with Super Smash Bros. Ultimate, and would pretty much trade a kidney for Skate 4 at this point.

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