In Zephi's first backstory there's a missing "zeb1_1" bg image (there's a 'zep1_1' in game resources, so i guess that was a typo).
Viewing post in Soul Trouble 0.6 Devlog comments
Huh, that's weird. I just tested it again and it's working just fine for me. I noticed an issue right after uploading so I took it down, then re-uploaded the fixed version. Maybe you downloaded it right at that time? If not, there shouldn't be any issues. I'll test it again just in case
Edit: Yeah, turns out it wasn't the only issue. Uploaded a hot-fix. Sorry about that, and thanks for letting me know about this one!