A few errors or issues are par for the course with modern game launches.
In this post,MiniToolintroduces how to fix UE4 fatal error via 6 troubleshooting tips.
Maybe you are also a victim.

On the computer screen, you see the message saying The UE4-Client Game has crashed and will close.
This issue seems to be in connection with the engine.
Below are some effective ways to help you get back to playing seamlessly.
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#1.
It may run in the background and be in a frozen state, blocking the game from starting again.
In the event of Wuthering Waves fatal error, correctly close it and relaunch it.

Step 1: In Task Manager, go toProcessesto see if it runs in the background.
If yes, end that task.
Step 2: Launch this game again to see if the fatal error still appears.
Or, power cycle your box and launch the game.
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#2.
Bypassing the launcher and running this game from the game folder can address your issue.
So, take the steps to have a try.
Step 1: Locate the Wuthering Waves folder to which you previously installed this game.
Step 2: Find the launcher.exe file and run it to launch this game.
#3.
To fix this crash, have a go at verify the game files via the Epic Games Launcher.
Step 1: In the launcher itself, tap on thewrench iconin the top-right corner.
Step 2: In the popup, tap onConfirmto start scanning the game directory and fix its corruption.
#4.
How do I update my graphics driver Windows 11?
How to update graphic card driver Windows 11?
This article offers 5 easy solutions!
To address it, take some steps to plant the latest version of Microsoft Visual C++.
Step 1: Go to theMicrosoft Visual C++ Redistributables page.
Step 2: Download both the x86 and x64 versions and install them on your PC.
Step 3: See if WuWa can run without the UE4 fatal error.
If you still get the same issue, also download the older versions and install them.
#6.
Step 1: In Steam, go toLibrary.
Step 2: On the bottom left corner, tap onAdd a game > Add a Non-Steam Game.
Step 3: Browse the installation location of Wuthering Waves and addClient-Win64-Shipping.exe.
Step 4: Restart the Steam client, right-tap on Wuthering Waves, and chooseProperties.
Step 5: Writedx11in theLaunch Optionsfield.
Then you’re able to launch this game from the Steam library without the fatal error.
Try them one by one until you find the fix that works for you.