Troubleshooting "Serialization Error Action Needed" in Ready or Not

1. Verify Game Files:

This is the first troubleshooting step. Ensure Steam isn't in offline mode.

• Locate Ready or Not in your Steam library.
• Right-click, select "Properties," then "Local Files," and finally "Verify Integrity of Game Files."
• Steam will scan and replace any corrupted or missing files. Retry launching the game. If successful, the issue is resolved.

2. Remove Mods:

Outdated or incompatible mods, especially those not updated for Unreal Engine 5 (post-July 2024), are frequent culprits.

• In your Steam library, right-click Ready or Not, select "Manage," then "Browse Local Files."
• Navigate to ReadyorNot\Content\Paks.
• Delete the mod.io folder.

This will disable all mods. The game should now launch. However, you'll need to reinstall compatible mods.

3. Reinstall Mods (Selectively):

Reinstall mods one at a time to identify any problematic ones.

• Visit the mod's source (Nexus Mods, Mod.io, etc.).
• Check the last update date. Only install mods updated after July 2024 (the UE5 update).
• Install a single mod, launch the game. If the error returns, that mod is incompatible. Repeat this process for each mod.

4. Reinstall Ready or Not:

As a last resort, uninstall and reinstall Ready or Not completely. While less likely, hard drive corruption could also be a factor. However, outdated mods are the most common cause of this error.

Ready or Not is available on PC.