The Clipboard cannot be emptied. Another program might be using the Clipboard [ANSWERED]

The Problem is Skype Click to Call Button.

cliboarded empty

Skype Click to Call add-on that is installed in your browser when you install Skype. Skype released a new version of this add-on back in April that resolves this issue with Excel.

The following sticky goes into more detail about how to get the latest version of Skype’s Click to Call:

Text loses formatting when I use Cut, Copy, Paste, Paste Special or Format Painter in Excel