Using Windows 8.

I am unable to create folders in, modify the contents of, copy from, or paste into OneDrive via the explorer ribbon. The options cannot be selected. I recently (about a week ago) changed the location of my OneDrive folder, which I assume is what has upset it. I have not noticed any problems with OneDrive in this period, I can open and save files, I can copy and paste using Ctrl+C and Ctrl+V, and create new folders via the right-click menu without issue, just not via the ribbon. I assumed this was a permissions problem and gave 'Authenticated Users' and then 'Users' 'Full Control' of the OneDrive folder, but this has made no difference. What could be wrong?