Unreal 5.4 crash/will not start "Unreal Zen Storage Server failed to launch"

[AndyMiira]

@alx123

After downloading the Engine, find zenserver.exe in the Engine\Binaries\Win64 directory, and run it, then restart the project or engine

@ZetaGameRus

Start the engine, then when the launcher closes, immediately start ZenServer.exe from the folder - this way the same error will appear, but the engine will start. When you load the project after starting the 5.4 engine, you repeat exactly the same thing

This worked for me, thanks!

EDIT: When launching the engine or opening my projects (via Epic Launcher, IDE, etc.), I run ZenServer.exe right after the Unreal Engine splash screen appears.
The “Unreal Zen Storage Server failed to launch” error message still appears, but after closing the message, the engine always starts up reliably.