I can't drag and drop my item into other applications

When I want to drag and drop an item (such as a pdf document) into an application such as a browser, the mouse beacon displays a black circle with a diagonal line in the middle.So I can't copy quickly by dragging and dropping.Thank you very much.(English is not my mother tongue, so I'm sorry, my question was translated by machine.)
ID:1433530168
Sign Inor Registerto comment.