unable to add to shared folder on icloud

It might be but I resolved the issue by selecting the folder I wanted to share. Right clicking on the folder gave me an option to share the folder which I did. Once shared, the folder appeared in the "shared folder". I think the shared folder is only a place holder and it's not possible to drag directly into it. It only housed files already shared.

Again thanks for your help and prompt replies.

Thanks for that but that option does not exist in the menu.