UEFN crashes when a subtitles track gets added in the sequencer

Summary

When trying to add a subtitle track to a level sequence, UEFN crashes without adding a subtitle track.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

Add a subtitles track to a level sequence in the UEFN sequencer.

Expected Result

A subtitles track should get added.

Observed Result

UEFN crashes immediately.

Platform(s)

PC