We need to convert Windows path to WSL path: C:\Users\user\Documents\script.sh -> /mnt/c/Users/user/Documents/script.sh
"shellscript": "bash $('/mnt/' + $fullFileName.Substring(0,1).ToLower() + $fullFileName.Substring(2).Replace('\\','/') )",
// Place your settings in this file to overwrite the default settings