I wasn't talking about datastores. I'm talking about the view in the vSphere Client.
Open up the vSphere Client ... and go into the VMs and Templates view (C# = Home button at the top, then VMs and Templates)
In this view there should be a number of Blue folder Icons. Make sure none have the same name as you are describing.
This is directly related to the error message in the vSphere client image you took in the original post "can not create folder.PNG"
vCloud is producing an error because of something happening in vCenter.