Describe the bug

UTMT gives an error and crashes when searching unreferenced assets in empty groups.
I know, why should I search unreferenced assets in empty groups? Well, I was just looking for bugs.



The game was Undertale.

Reproducing steps

1. Open UndertaleModTool
2. Open Undertale's data.win
3. Go to Find
4. Click Find unreferenced assets
5. Select the empty group
6. Click search
7. Error

Setup Details

1. UndertaleModTool version: Bleeding Edge 6056f06
2. OS: Windows 11 Pro