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

*Ready or Not* might sound like a children's game, but don't let the name fool you—this is a gritty, tactical SWAT FPS designed for both single and multiplayer experiences. However, players may occasionally encounter technical issues, such as the "Serialization Error Action Needed" error. Here's how to resolve this error in *Ready or Not*.

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

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 that Steam is not in offline mode.
• Go to your Steam Library and locate *Ready or Not*.
• Right-click on the game 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 the verification process, launch *Ready or Not* again to see if the issue is resolved. If the problem persists, you may need to try other solutions.

2. Remove Any Mods

The "Serialization Error Action Needed" can also be triggered by outdated or broken mods, especially those not updated for Unreal Engine 5.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

• Go to your Steam Library and find *Ready or Not*.
• Left-click on "Manage," then "Browse Local Files."
• Navigate to the ReadyorNot folder, then the Content folder, and finally the Paks folder.
• Delete the mod.io folder.
• Launch the game to check if the error is resolved. Note that this will remove all your mods, so you'll need to reinstall them carefully.

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

3. Reinstall Your Mods

Once you've removed the mods, you can begin reinstalling them one by one. Here's how:

• Visit Nexus Mods, Mod.io, or your preferred mod source.
• Check the last update date for each mod. Only install mods updated after July 2024, when *Ready or Not* transitioned to Unreal Engine 5.
• Install one mod at a time and launch the game after each installation to check for the error.
• If the error reappears, the last mod you installed is likely the cause. You'll need to skip that mod until it's updated for UE5 compatibility.

If these steps don't resolve the issue, consider uninstalling and reinstalling *Ready or Not* from scratch. Although rare, hard disk corruption could be a factor, but most reports point to outdated mods as the primary cause of this error.

That's how you can fix the "Serialization Error Action Needed" in *Ready or Not*. The game is currently available for PC players.