What is the dash beside sounds in my media bay?

I have some new libraries. When i open my media bay on the right and choose say, Ambient Lounge, I get options with a dash beside them. they don’t seem to be audio or Vst. How Can i open them?

The dash indicates that the file is not available. Either it has been erased from its location or you try to use a product that requires a license and you don’t own that license.