How To Fix ‘Serialization Error Action Needed’ in Ready or Not

Ready or Not might sound like a kid's game, but don't let the name fool you—there's nothing child-friendly about this intense SWAT-focused FPS designed for both single and multiplayer action. However, you might encounter some technical hiccups along the way. 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

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

1. Verify Your Installation

Start by following the error message's advice: verify your installation. Here's how you do it through Steam:

• 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 scan for any missing or damaged files and re-download them if necessary.
• After the process, launch Ready or Not again to check if the issue is resolved. If not, proceed to the next step.

2. Remove Any Mods

The "Serialization Error Action Needed" can also be triggered by outdated or incompatible mods, especially those not updated for Unreal Engine 5. To remove mods, follow these steps (as suggested by CosmoCart):

• In your Steam Library, find Ready or Not.
• Left-click on "Manage" and then "Browse Local Files."
• Navigate through the "ReadyorNot" folder to the "Content" folder, then to "Paks."
• Delete the "mod.io" folder.
• Launch the game to see if the error is resolved. Note that this step will remove all your mods.

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

3. Reinstall Your Mods

Once you've cleared the mods, you can start reinstalling them one at a time. Here's how:

• Visit Nexus Mods, Mod.io, or your preferred mod source.
• Check the update date of each mod. Only install mods updated after July 2024, when Ready or Not transitioned to Unreal Engine 5.
• Install a mod, then launch the game to test it. If the error reappears, the last mod you installed is likely the culprit and should be skipped until it's updated for UE5 compatibility.

If these steps don't resolve the issue, consider a full uninstall and reinstall of Ready or Not. Although less common, hard disk corruption could also be a factor, but most cases of this error are linked to outdated mods.

By following these steps, you should be able to fix the "Serialization Error Action Needed" in Ready or Not and get back to your tactical gameplay.

Ready or Not is available now for PC.