[Octopath Traveler 0] Game won't run

[GangstaVik]

❗ Crash on launch with latest UE4SS build (Win64, no crash report)

Description

I tried using the latest UE4SS release by placing the Win64 files into the game’s Win64 directory.
On launch, the UE4SS console briefly appears and then the game crashes immediately, without generating any crash report or log.

What I tried

• Tested both Dev and non-Dev builds → same behavior
• Clean setup, only UE4SS files added
• No mods loaded (baseline test)

Expected behavior

Game should launch normally with UE4SS injected, or at least produce a crash log or error output.

Actual behavior

• UE4SS console window appears
• Immediate crash right after
• No crash report or useful output generated

Notes

• I haven’t tested older UE4SS versions yet, as I’m trying to stay on the latest release
• I can test previous versions if needed to help isolate a possible regression

Environment

• OS: Windows 11 latest (Win64)
• UE4SS version: latest release
• Game: as per title (Octopath Traveler 0)

[UE4SS]

Double check if there's a UE4SS.log file, because it seems very strange that there wouldn't be if execution gets so far as to spawn the console.
If you don't find one, can you show the path you're checking to confirm that you're looking in the right place ?

[UE4SS]

Also, just saying "latest release" isn't enough.
We've had many people mistake the latest 3.0.1 release as the latest version available.
We have much more recent experimental releases and that's what you must use at the moment for almost all newer games.
That's why we prefer you include the commit hash or the name of the zip you downloaded instead.
You can find the latest experimental release here: https://github.com/UE4SS-RE/RE-UE4SS/releases/tag/experimental-latest

[hamerguy0604]

I'm also having the same issue with the ue4ss experimental build 3.0.1... my game just closes as soon as I open it... I don't know the reason tho... And the normal v3.0.1 works perfectly fine

I use SteamOS btw

[narknon]

I don't own 0 unfortunately so I can't really look into this. Other 2 worked afair

[UE4SS]

I'm also having the same issue with the ue4ss experimental build 3.0.1... my game just closes as soon as I open it... I don't know the reason tho... And the normal v3.0.1 works perfectly fine

I use SteamOS btw

And yet you chose to not read my comment and follow the instructions there ?
None of the maintainers have this game, and no one has supplied the requested information or taken the requested steps, so we're no further to figuring out the problem.

[hamerguy0604]

i removed my mods

[UE4SS]

This is interesting.
Not really sure what's going on here though.

It should be impossible for our own GUI to appear without UE4SS.log being created, so maybe the "console" they mentioned isn't our GUI but is instead the Windows "command prompt"-looking window.
You could try take a screenshot of it before it disappears when it crashes, it could have useful information.

[hamerguy0604]

I've got no time right now since it's almost Christmas so maybe after Christmas I could get those screenshots

[GangstaVik]

This is interesting. Not really sure what's going on here though.

It should be impossible for our own GUI to appear without UE4SS.log being created, so maybe the "console" they mentioned isn't our GUI but is instead the Windows "command prompt"-looking window. You could try take a screenshot of it before it disappears when it crashes, it could have useful information.

Sorry for the late reply — here’s some additional info.

• The “GUI” I mentioned is indeed the Windows 11–style console window which in my case matches the ue4ss console because it's printing its output.
• The console output matches exactly the contents of the generated .log file (attached below).
• UE4SS version: latest experimental build
  https://github.com/UE4SS-RE/RE-UE4SS/releases/tag/experimental-latest
• Game version: latest (Octopath Traveler 0)

Log excerpt:

[2025-12-22 10:12:26.3454522] Console created
[2025-12-22 10:12:26.3538648] UE4SS - v3.0.1 Beta #0 - Git SHA #9a20a8f
[2025-12-22 10:12:26.3540050] Timezone: Europe/Rome
[2025-12-22 10:12:26.3541166] UE4SS Build Configuration: Game__Shipping__Win64 (MSVC)
[2025-12-22 10:12:26.3568503] Setting up mods...
[2025-12-22 10:12:26.3572464] Loading mods from: C:\SteamLibrary\steamapps\common\Octopath_Traveler0_DEMO\Octopath_Traveler0\Binaries\Win64\ue4ss\Mods
[2025-12-22 10:12:26.3917497] Starting mods (from mods.txt (C:\SteamLibrary\steamapps\common\Octopath_Traveler0_DEMO\Octopath_Traveler0\Binaries\Win64\ue4ss\Mods\mods.txt) load order)...
[2025-12-22 10:12:26.3991524] Starting C++ mod 'KismetDebuggerMod'
[2025-12-22 10:12:26.3994685] Starting mods (from enabled.txt (C:\SteamLibrary\steamapps\common\Octopath_Traveler0_DEMO\Octopath_Traveler0\Binaries\Win64\ue4ss\Mods), no defined load order)...
[2025-12-22 10:12:26.3997475] Mod '100% Path Actions' has enabled.txt, starting mod.
[2025-12-22 10:12:26.4000461] Mod 'Quick Study' has enabled.txt, starting mod.

From a debugging perspective, this feels like the crash happens after UE4SS bootstrap completes but before control is fully handed back to the game unlikely to what happens with the stable 3.0.1 release which works w/o the ue4ss folder to contain all the subfolders.

[narknon]

You have a mod installed and the log crashes right after that? Maybe that mod is the issue?

[hamerguy0604]

What's the mod GangstaVik that you are using... It might have been the issue with mine as well

[UE4SS]

What's the mod GangstaVik that you are using... It might have been the issue with mine as well

The log file shows Quick Study as the last mod started before it's using.
The only other third-party mod started before it crashes is 100% Path Actions.

[hamerguy0604]

Well I didnt have quick study mod Installed and I ran the game without any mods to see if it was one of my mods but the game still closed as soon as I opened it

[narknon]

try turning off all hooks in settings and see if anything changes

[hamerguy0604]

Game loads with hooks turned off