Can't open TetherGeist Demo's data.win (invalid boolean value)

[Imaynotbehere4long]

Describe the bug

Trying to open the data.win for TetherGeist's demo triggers this lengthy error message:

This error message is triggered on 0.6.1.0, the Dec. 2 Bleeding Edge build, this fork that worked on Zero Orders Tactics and Grapple Dogs: Cosmic Canines, and this other fork that worked on the demo for Me and (My) Cat's Island.

The demo even got updated recently, but the only difference with this error is that the previous build had a slightly different location for the (first?) invalid boolean.

Reproducing steps

Download the free demo for TetherGeist and try opening its data.win file on any build of UndertaleModTool.

Setup Details

1. 0.6.1.0, Dec. 2 Bleeding Edge, https://github.com/UnderminersTeam/UndertaleModTool/actions/runs/10398025646/artifacts/1814233921 and https://github.com/luizzeroxis/UndertaleModTool/actions/runs/12170130335/artifacts/2276480030l
2. Windows 10
3. https://store.steampowered.com/app/2474430/TetherGeist/