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

*Ready or Not* might sound like a kid's game, but there's nothing child-friendly about this intense SWAT-themed first-person shooter, playable in both single and multiplayer modes. However, players might occasionally encounter technical issues. 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" often comes with the message "Corrupt data found, please verify your installation." This error is linked to the Unreal Engine and can be resolved through several steps.

1. Verify Your Installation

The first step is to follow the error message's advice and verify your installation. Here's how:

• Ensure Steam is not in offline mode.
• Go to your Steam Library, find *Ready or Not*, right-click on it, and select "Properties."
• Click on "Installed Files," then "Verify Integrity of Game Files."
• This process will check for any missing or damaged files and re-download them if necessary.
• After verification, relaunch *Ready or Not*. If the game runs without errors, you're set. 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The "Serialization Error Action Needed" can also be triggered by outdated or incompatible mods, especially since *Ready or Not* has transitioned to Unreal Engine 5. To remove mods:

• From your Steam Library, find *Ready or Not*, left-click on "Manage," and then "Browse Local Files."
• Navigate through the "ReadyorNot" folder, then "Content," and finally "Paks."
• Delete the "mod.io" folder.
• Try running the game again. If it works, you've successfully removed the problematic mods but will need to reinstall them selectively.

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

3. Reinstall Your Mods

To reinstall your mods safely:

• Visit Nexus Mods, Mod.io, or your original mod source.
• Check the update date of each mod. Only install mods updated after July 2024, when *Ready or Not* switched to UE5.
• Install one mod at a time and run the game to check for the error.
• If the error reappears after installing a mod, that mod is likely incompatible with UE5, and you should avoid using it.

If these steps don't resolve the issue, consider uninstalling and reinstalling *Ready or Not* from scratch. While rare, hard disk corruption could also be a cause, but most reports link the error to outdated mods.

That's how to fix the "Serialization Error Action Needed" in *Ready or Not*. Enjoy your enhanced gaming experience!

*Ready or Not is available now for PC.*