ERR_FSPROVIDER_CANNOT_CREATE_FOLDER_ON_DIRECTORY_UNAWARE_FS: Cannot create a folder on this type of file system

You are trying to create an empty folder on a system that does not support it.

For example, S3 is not an actual file system. It identifies objects with keys, which may or may not look like a path on a file system. You can have a single object with key a/b/c.txt, which will be presented by many tools, DSS included, as a folder a, containing a folder b, containing a file c.txt. But them, you cannot have an empty folder e/f/, you need an actual file e/f/g.txt that will get prensented as a folder e/f.