Sprites aren't getting exported for some reason

[NeoTankyTankman]

Describe the bug

When opening Undertale Mod Tool I went to go extract Frisk's sprites from the up sprite to the right sprite and Undertale Mod Tool extracts it BUT I am told the file is either moved or renamed which I guess is the bug and basically the error in it.

Reproducing steps

1. Open Undertale Mod Tool
2. Try extracting Frisk's walking sprites
3. They get extracted but it then says they are moved or renamed.

Setup Details

1. Undertale Mod Tool 0.6.1.0 I think
2. Windows 11
3. Basically Undertale