Can't use the fill and sign tool as the document window goes blank
I am using Adobe Acrobat Reader version 2017.0009.20044 on a Mac using sierra version 10.12.4. A few weeks ago I could sign and put text onto pdf's ( using fill and sign tool), now all I can do is highlight. When I try to use the fill and sign tool I get a tool bar on the top of the window as usual but the rest of the window that normal shows the document is blank. I have uninstalled and re-installed ( from a new download) adobe but the problem remains. please help.
