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

If you're diving into the intense world of *Ready or Not*, a tactical SWAT FPS that's anything but child's play, you might encounter the occasional technical hiccup. One such issue is the "Serialization Error Action Needed" error. Here's a step-by-step guide to get you back into the action swiftly.

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

1. Verify Your Installation

The first step is to verify your installation as suggested. Ensure Steam is not in offline mode and follow these steps:

• Go to your Steam Library and locate *Ready or Not*.
• Right-click on the game and select 'Properties.'
• Click on 'Installed Files.'
• Select '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 issue persists, further action is needed.

2. Remove Any Mods

The "Serialization Error Action Needed" can often be triggered by outdated or incompatible mods, especially those not updated for Unreal Engine 5.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

• From your Steam Library, find *Ready or Not*.
• Left-click 'Manage' and then 'Browse Local Files.'
• Navigate through the 'ReadyorNot' folder to 'Content' and then 'Paks.'
• Delete the 'mod.io' folder.

This should allow the game to run, albeit without your mods. But what if you want your mods back?

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

3. Reinstall Your Mods

To get your mods back, reinstall them one at a time. Visit Nexus Mods, Mod.io, or your mod source and check the update date of each mod. Only install mods updated after July 2024, when *Ready or Not* transitioned to UE5. Here's the process:

• Download a mod updated for UE5.
• Install it and then launch the game to test.
• If the error reappears, the last installed mod is likely the culprit. Remove it and continue with the next mod.

If you still face issues after these steps, consider a full uninstall and reinstall of *Ready or Not*. While hard disk corruption is a possibility, most cases of this error are linked to outdated mods. That's how you can fix the "Serialization Error Action Needed" in *Ready or Not*.

*Ready or Not is available now for PC.*