Fix 'Serialization Error Action Needed' in Ready or Not: Quick Solutions

*Ready or Not* might sound like a kid's game, but don't be fooled—this SWAT-themed first-person shooter is anything but child-friendly. Whether you're playing solo or teaming up in multiplayer, you might encounter the occasional technical hiccup. Here's a comprehensive guide on how to fix the "Serialization Error Action Needed" in *Ready or Not*.

How To Tackle 'Serialization Error Action Needed' in Ready or Not

Screenshot via The Escapist

The *Ready or Not* error "Serialization Error Action Needed" typically comes with the message "Corrupt data found, please verify your installation." This is an issue related to the Unreal Engine, and there are several steps you can take to resolve it.

1. Verify Your Installation

The first step is to follow the game's prompt and verify your installation. Here’s how to do it:

• Ensure Steam is not in offline mode.
• Navigate to your Steam Library and locate *Ready or Not*.
• Right-click on the game and select "Properties."
• Go to "Installed Files" and click on "Verify Integrity of Game Files."
• Steam will check for any missing or damaged files and re-download them if necessary.
• After the process, try running *Ready or Not* again. If the error persists, move on to the next solution.

2. Remove Any Mods

The "Serialization Error Action Needed" can also be triggered by outdated or incompatible mods, particularly those not updated for Unreal Engine 5. Here's how to remove mods:

• Go to your Steam Library and find *Ready or Not*.
• Left-click on "Manage" and then "Browse Local Files."
• Navigate through the folders: "ReadyorNot" > "Content" > "Paks."
• Delete the "mod.io" folder.
• Try running the game again to see if the error is resolved.

Related: Ready or Not: What’s Better, DirectX 11 or DirectX 12 (DX11 vs. DX12)?

3. Reinstall Your Mods

If removing mods resolved the issue, you can try reinstalling them one at a time to identify any problematic mods:

• Visit Nexus Mods, Mod.io, or your mod source and find the mod pages.
• Check the last update date of each mod. If it was updated after July 2024, when *Ready or Not* transitioned to Unreal Engine 5, it should be safe to install.
• Install one mod, launch the game, and check for the error.
• Repeat this process until you find the mod causing the error, which you will need to skip.

If all else fails, consider uninstalling and reinstalling *Ready or Not* from scratch. Although less common, hard disk corruption can also cause this error, but outdated mods are the most frequent culprit.

By following these steps, you should be able to resolve the "Serialization Error Action Needed" in *Ready or Not*. Enjoy your gaming experience on PC, where *Ready or Not* is currently available.