[Bug] Unable to start session after Localization build in v40.0 (Star Wars templates)

Summary

Session fails to start without error after running Build > Localization in the Star Wars template (v40.0), and localized text is missing.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Steps to Reproduce

Steps to Reproduce (재현 단계)

Open the Star Wars template in UEFN (v40.0).

Run Build > Localization.

Attempt to start a session. (Observe session fails to start).

Reboot PC, start a session, and attempt to play the game in a localized language (Non-English). (Observe missing text).

Run Build > Localization again. (Observe session fails to start again).

Expected Result

The session should start successfully after running the localization build. Additionally, in-game text should display correctly when playing in the selected localized language.

Observed Result

The session fails to start entirely with no error messages.

Restarting the Epic Games Launcher does not fix the issue. A full PC reboot is required to temporarily resolve it.

Running the localization build again causes the same session start failure.

When playing in a localized language, no text is displayed. Text is only visible when the language is set to English.

Platform(s)

PC (Windows11)

After running the localization build, I was only able to relaunch the game after manually force-closing the Fortnite process in Task Manager. It appears that sessions launched via the localization build do not terminate properly and require a manual force-quit to close.