Call of Duty: Warzone – How to Fix Dev Error 6635 and 5573

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As the new year kicks off, existing, popular titles get a much-needed overhaul. And we don’t just mean the buggy Cyberpunk 2077 getting its zillionth patch, either. Great AAA games from 2020, like Call of Duty Warzone, still command a huge player base. Warzone is a successful battle-royale that offers a terrific twist on the franchise’s traditional FPS gameplay. Luckily enough, both Beenox and Activision, the developers, maintain constant support for the title through regular updates and content additions.

One interesting new breakthrough for Warzone is Nvidia’s new announcement of the implementation of their signature DLSS feature. DLSS (Deep Learning Super Sampling) is a revolutionary technology in the world of PC gaming. It essentially uses clever downscaling and upscaling to maximize game performance, with little to no visual cost. This means, at least for PC gamers with Nvidia RTX GPU’s, that Warzone further rewards its own players with significantly improved performance.

However, Warzone comes with a few glaring issues. The main concern of many skeptics is ridiculous storage management. Console versions require approximately 85-100 GB, despite the game’s always-online requirement.

On PC, the game comes bundled with Modern Warfare, which unnecessarily increases installation size. Furthermore, occasional game-breaking exploits and cheats allow players to become nearly invincible, ruining multiplayer matches. And, of course, sometimes severely disruptive bugs and errors tarnish the Warzone experience.

A new error recently sprung up, kicking players out of their matches and making them stuck on the main menu

The latest Warzone update, Rebirth Island, saw a great new multiplayer map and several content additions. However, some suspect that it also caused the rise of Warzone Dev Error 5573 and Dev Error 6635. These errors appear almost equally across PC, Xbox, and PS5 versions of the game. Both developer error codes behave similarly and reflect an internal issue with Activision’s online services.

Players affected by Warzone Dev Error 5573 or 6635 often report issues with the game’s multiplayer. Apparently, the issue occurs commonly during loadout selection, but some report it popping up in the middle of matches. That means players in ranked, competitive settings can suddenly lose their entire progress. What’s more, the issue seems to pertain to player’s Activision accounts rather than simple software.

This theory stems from the fact that players across all platforms see the same incidence of the Warzone Dev Error 5573 and 6635. That rules out any specific issue with the hardware. In addition, the dev errors occur repeatedly on the same affected accounts. That means one could switch from their PC to their PS5, using the same Activision account, and face it repeatedly. The bottom line is that Activision and Beenox should investigate and resolve the dev error via an update or patch, hopefully soon. In the meantime, we show you the most effective and reliable fixes for the Warzone Dev Error 6635 and Dev Error 5573.

1) Restart your PC or console, and launch the game again

The main function of a computer is to run multiple, complex processes simultaneously. When your PC runs for extended periods, the countless, elaborate processes can accrue bugs. This leads to overall compromised system performance and may cause unexpected errors in your game. That is precisely why we abide by the age-old “turn it off and on again”. To do this, simply restart your PC. This will kill off any malfunctioning processes and corrupted memory. The game should now run much more stably.

To do this on the Xbox or the PS4/PS5, care must be taken to properly shut the game down. If you simply press the power button, the system ends up in the default Standby Mode instead. Make sure you close your game via the options and then power off your console completely. Then, boot Warzone up again.

2) Run Warzone as Admin on your PC

On the PC side of gaming, Windows often gets in the way of perfectly innocuous games. The approach is to curb online connections in the name of security, but it is often a poor judge of suspicion. That’s why running the game as an Admin, by right-clicking on the Warzone icon, can help. When you run the game as an Admin, you give Windows permission to whitelist the game and associated processes. Your connection with Blizzard and the game’s servers should no longer face undue blockages.

3) Configure your internet settings to optimize it for online gaming

The main issue with most internet service providers (ISPs) is their penchant for conservative security. Nothing wrong with staying safe from malware, but the cost is high. Online game services, like Activision’s servers, often end up on the blacklist for nothing. This can result in Warzone dev error 5573 and dev error 6635. To take the configurations into your own hands, contact your ISP for login details for your router’s portal. Once logged in, look for the options for the advanced settings.

The first of these is enabling Quality of Service (QoS). This nifty feature allows you to prioritize your game’s bandwidth over less important devices on your home network. Second, you have NAT type, which determines how lax your network security is to allowing online connections. Changing this from the default Strict to Moderate will help strengthen your connection, preventing dev errors, while keeping you secure.

4) On PS4 and PS5, you should rebuild your game databases

The advantage PlayStation consoles have over the Xbox systems is the ability to access several hidden tools. One of these is the option to rebuild a poorly-running game’s database. This essentially irons out bugs and reorganizes the storage for the game, eliminating bugs and errors. To do this, power off your console, then hold the power on until you hear a unique audio cue. This indicates that you’ve entered Safe Mode. From here, navigate to individual games and select the option for rebuilding your database.

5) The dreaded last resort – reinstall Warzone

No one likes to delete and reinstall games. Especially when said game is roughly a 100 GB, and you don’t have blazing fast internet speeds. But still, it sometimes becomes imperative to fix dev errors. When the data in your game’s files get corrupted, a total wipe and fresh installation is necessary. However, keep in mind that the results will be worth it.

For more on Call of Duty, Warzone and fixes, stay tuned!

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