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

*Ready or Not* might sound like a kid’s game, but it's far from it. This intense SWAT-themed FPS offers both single and multiplayer experiences. However, you might occasionally encounter technical glitches, such as the "Serialization Error Action Needed." Here’s how to resolve this frustrating issue in *Ready or Not*.

How to Fix ‘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 is an Unreal Engine error, 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. Ensure your Steam is not in offline mode, then:

• Go to your Steam Library and find *Ready or Not.*
• Right-click on it and select "Properties."
• Click on "Installed Files."
• Select "Verify Integrity of Game Files."

This process checks for missing or damaged files. If Steam detects any issues, it will re-download the necessary files. After this, restart *Ready or Not* to see if the error is resolved. If the problem persists, proceed to the next step.

2. Remove Any Mods

The "Serialization Error Action Needed" can often be caused by outdated or incompatible mods, especially since *Ready or Not* has transitioned to Unreal Engine 5. To remove mods, follow these steps (via CosmoCart):

• Go to your Steam Library and find *Ready or Not.*
• Left-click on "Manage" and then "Browse Local Files."
• Double-click on the "ReadyorNot" folder.
• Double-click on the "Content" folder.
• Double-click on "Paks."
• Delete the "mod.io" folder by left-clicking on it and pressing the delete key or right-clicking and selecting "delete."

After removing the mods, try running the game again. If it works, you'll need to reinstall your mods carefully.

3. Reinstall Your Mods

To reinstall mods, visit Nexus Mods, Mod.io, or your preferred modding platform and locate the pages for your mods. Before installing:

• Check the last update date of each mod. If it was updated after July 2024, when *Ready or Not* transitioned to UE5, it should be safe to install.
• Install mods one at a time, testing the game after each installation.
• If the error reappears, the last installed mod is likely the culprit. You'll need to skip it if it hasn't been updated for UE5.

If these steps don't resolve the issue, consider uninstalling and reinstalling *Ready or Not* from scratch. Though rare, hard disk corruption can also cause this error, but most cases are linked to outdated mods.

And that's how you can fix the "Serialization Error Action Needed" in *Ready or Not*. Enjoy your enhanced gaming experience!

*Ready or Not is available now for PC.*