can't open data.win (out of chunk bounds) for Me and (My) Cat's Island Demo

[Imaynotbehere4long]

Describe the bug

Both version 0.6.1.0 and the fork linked in this thread trigger this error when trying to open the data.win for Me and (My) Cat's Island Demo:

I was unable to test this on the Oct. 8 bleeding edge version because that build (GUI-windows-latest-Debug-isBundled-true-isSingleFile-true) wouldn't run at all for me, even after clicking "Run Anyway" on the Windows Defender pop-up. I double-click its icon, it pretends to load for a second or two, then nothing.

Reproducing steps

1. Download the free demo for Me and (My) Cat's Island
2. Try opening the data.win file
3. If it does work on the Oct 8 bleeding edge build, don't close this thread yet because that build doesn't run for me at all for some reason.

Setup Details

1. 0.6.1.0 and
   https://github.com/UnderminersTeam/UndertaleModTool/actions/runs/10398025646/artifacts/1814233921
2. Windows 10
3. https://store.steampowered.com/app/2703970/Me_and_My_Cats_Island/