How to Fix Palworld UE4SS Crash: Ultimate Troubleshooting Guide

I absolutely love modding games. Half the fun of titles like Palworld comes after you’ve finished the main progression and start experimenting with quality-of-life improvements, gameplay tweaks, and completely ridiculous mods that make every session feel different. The downside? Every major update can turn your carefully built mod setup into a complete disaster.

One of the biggest troublemakers is UE4SS (Unreal Engine 4/5 Scripting System). It’s an essential tool for many Palworld mods, but it’s also the first thing that tends to break after Pocketpair releases a patch. If your game suddenly crashes on startup, freezes during loading, or throws mysterious Unreal Engine errors, chances are UE4SS—or one of your mods—is responsible.

After spending far too many evenings fixing my own installation and reading through countless Steam discussions, Reddit posts, and GitHub reports, I realized that most crashes come down to a handful of common problems. Here’s the approach that has consistently worked for me.

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Why UE4SS Starts Crashing After Updates

UE4SS works by hooking directly into Unreal Engine, allowing mods to access systems that normally wouldn’t be available. That’s exactly what makes it so powerful, but it’s also the reason it can become unstable after official updates.

Every Palworld patch changes parts of the game’s internal code. Even relatively small updates can modify memory addresses, functions, or engine structures that UE4SS depends on. Once that happens, an older version of the scripting framework simply isn’t compatible anymore.

When that mismatch occurs, you’ll usually notice one or more of these issues.

• Instant crash when launching the game.
• Infinite loading screen.
• Fatal Unreal Engine error.
• Black screen before the main menu.
• Random crashes during gameplay.

From my experience, these problems rarely mean Palworld itself is broken. More often, it’s the relationship between the latest game version, UE4SS, and your installed mods that’s causing everything to fall apart.

Update UE4SS Before Trying Anything Else

If there’s one fix I’d recommend starting with every single time, it’s updating UE4SS. I’ve seen plenty of players spend hours reinstalling graphics drivers or changing Windows settings, only to discover they were simply running an outdated version.

Installing the latest release usually takes just a few minutes.

1. Download the newest version of UE4SS that supports the current Palworld update.
2. Open your Palworld installation folder.
3. Navigate to Pal → Binaries → Win64.
4. Replace the existing UE4SS files with the new ones.
5. Allow Windows to overwrite the older files.

I usually go one step further and delete the previous UE4SS files before copying the new ones. After several game updates, old files tend to accumulate, and starting with a clean installation has saved me from unexpected issues more than once.

Edit One Configuration Setting That Can Improve Stability

This fix surprised me because it looks almost too simple to matter, yet it has helped many players.

Open the UE4SS-settings.ini file inside the Pal/Binaries/Win64 folder and look for the following option.

Disable UObject Array Cache

Find:

bUseUObjectArrayCache=true

Change it to:

bUseUObjectArrayCache=false

This prevents UE4SS from using a caching system that occasionally conflicts with newer Palworld builds and can trigger memory-related crashes.

Disable the Debug Console

If you don’t use the built-in console, you can also change:

ConsoleEnabled=0

While this won’t dramatically improve performance, reducing unnecessary background processes can contribute to a more stable experience.

Check Whether One of Your Mods Is the Real Problem

One mistake I made early on was assuming UE4SS was responsible for every crash. Eventually I discovered that an outdated inventory mod was causing the entire game to fail during startup.

Mods that affect the user interface, inventory, building mechanics, multiplayer features, or player statistics tend to be the first ones that break after a major update.

The easiest way to identify a broken mod is to temporarily move every installed mod out of the Mods folder.

1. Move every mod into a temporary backup folder.
2. Launch Palworld.
3. If the game works, add your mods back one at a time.
4. Launch the game after each addition.
5. Once the crashes return, you’ve identified the incompatible mod.

It may take a little patience, but this method is far quicker than repeatedly reinstalling the entire game without knowing what actually caused the problem.

Use the Newer Injection Method

One interesting discovery from the Palworld modding community involves the way UE4SS loads itself into the game.

Older releases often relied on xinput1_3.dll. Depending on your Windows configuration, that injection method can become unstable after updates.

Newer versions typically use files such as dwmapi.dll, which many players have found considerably more reliable on both Windows 10 and Windows 11.

If your installation still depends on the older xinput method, switching to the latest UE4SS release may solve crashes without changing anything else.

Verify the Integrity of Your Game Files

Sometimes repeated crashes leave behind damaged or partially overwritten game files. Fortunately, Steam makes it easy to repair them.

1. Open your Steam Library.
2. Right-click on Palworld.
3. Select Properties.
4. Open the Installed Files section.
5. Click Verify integrity of game files.

Steam will compare every official file with the latest version on its servers and automatically replace anything that’s missing or corrupted.

I’ve personally had this process restore damaged files after a crash loop, allowing the game to launch normally again without touching my save data.

Perform a Completely Clean Reinstallation

Reinstalling isn’t anyone’s favorite solution, but sometimes it’s the fastest way to eliminate years of leftover files, outdated mods, and incompatible scripts.

If you’ve mixed several versions of UE4SS with multiple generations of mods across different Palworld updates, your installation can become surprisingly messy.

Launching the vanilla game before reinstalling your mods is an important step because it confirms that the base game is functioning correctly before introducing any additional variables.

Simple Habits That Prevent Future Crashes

After breaking my Palworld installation more times than I’d like to admit, I’ve settled into a routine that saves a lot of frustration whenever a new update arrives.

• Keep a backup of your Mods folder.
• Back up your save files before every major patch.
• Wait a day or two before reinstalling mods after updates.
• Read compatibility notes from mod authors.
• Remove mods you no longer use.

These small habits don’t take much effort, but they’ve saved me from repeating the same troubleshooting process over and over again.

Final Thoughts

One thing I’ve always appreciated about the Palworld community is how quickly mod creators respond after new updates. The first day or two following a major patch is usually the most unstable period because everyone is working to restore compatibility.

Instead of rushing to reinstall every mod immediately, I’ve learned to be patient. Updating UE4SS first, checking which mods have already been updated, and gradually rebuilding my mod list has consistently produced better results than trying to force everything to work on day one.

If your game suddenly starts crashing after an official Palworld update, don’t assume your PC or graphics card is at fault. Most of the time, it’s simply a version mismatch between the latest game build, UE4SS, and one or more outdated mods.

With an updated scripting framework, a clean configuration, carefully tested mods, and verified game files, there’s an excellent chance you’ll be back exploring islands, expanding your base, and catching new Pals without another crash interrupting your adventure.