Illegal folder name in Create: Interactive JAR file.

[Tjmaxmillion]

Windows has some reserved folder/file names, and when folders or files are named these things it can cause issues.

In this case Create: Interactive has a folder called aux located at org\valkyrienskies\create_interactive\aux in the jar.
This specific issue popped up with the HeliosLauncher, The launcher unarchives mods JAR files and stores them in a folder called "modstore".

This makes a folder called aux in the folder for Create: Interactive preventing the deletion of the root directory of the launcher.

TL;DR

Don't use Illegal file/folder names listed below.
Cause if the mod is unarchived on a windows machine for any reason it prevents the folder and any parent folder from being deleted by normal means.

Image Source

[blockninja124]

I can't find this folder name in source. Can you tell me what mod loader and minecraft version your using? If I still can't find it, its possible its a Kotlin bug (compiling stuff to an aux folder when it shouldn't) or this was already fixed earlier and this issue just wasn't closed.