Well, I copied something called library_files (some addtional resources for a vitamio library) and when I went to zip it up (from within B4A it was missing.
Additional resources should be placed under Objects i suppose.
Are you sure it is right to put this folder under this name into a b4a-project?
Or maybe you have to put them into FILES folder and then, from your app, you load them from assetsfolder.
I dont know vitamino lib