Crashes when selecting some specific rooms in Undertale Kindred Spirits

[ners-xd]

Describe the bug

I already opened an issue in UnderminersTeam/Underanalyzer, but I was told it's better to post it here: https://github.com/UnderminersTeam/Underanalyzer/issues/9

Reproducing steps

Check the above issue.

Setup Details

UTMT v0.6.0.0 (Underanalyzer) Windows 11 Undertale Kindred Spirits Prologue https://gamejolt.com/games/undertale-kindred-spirits/145217

[VladiStep]

It had some problem with rendering one of the tile layers, but it somehow couldn't show the message box with the error message : https://github.com/UnderminersTeam/UndertaleModTool/blob/8c5462c41eab770fa9bcb0da1cf5ed014bc20362/UndertaleModTool/Editors/UndertaleRoomEditor.xaml.cs#L2609