Failing save file in linux

[Dimoks]

On Ubuntu (WSL 2):

Permissions on Directories and Files:
drwxrwxrwx
-rwxrwxrwx

Path to compressonatorcli-bin is registered in $PATH.

compressonatorcli-bin "/mnt/d/images/dds/voice_icon.dds" "/mnt/d/images/png/voice_icon.png"

Processing source : /mnt/d/images/dds/voice_icon.dds
Processing destination: /mnt/d/images/png/voice_icon.png
Processing progress = 95MipLevel 1 FaceOrSlice 1
Error: saving image failed, write permission denied or format is unsupported for the file extension.

compressonatorcli-bin -ff DDS -fx PNG "/mnt/d/images/dds/DIALOG/" "/mnt/d/images/png/DIALOG"

Processing source : /mnt/d/images/dds/DIALOG/dialog_BG.dds
Processing destination: /mnt/d/images/png/DIALOG/dialog_BG.png
Processing progress = 100MipLevel 1 FaceOrSlice 1
Error: saving image failed, write permission denied or format is unsupported for the file extension.