TITLE:
Saving PDF file from Word always results in "a file conversion is already in progress" error on a Mac.

In Word the Acrobat ribbon's "Create PDF" button either does nothing when it is clicked or it results in "a file conversion is already in progress" error from Acrobat.

STEPS TO REPRODUCE THE ISSUE:
1. Open any Word Document
2. Click Acrobat tab to see the Acrobat Ribbon
3. Click "Create PDF"
4. This opens the "Acrobat Create PDF" dialog box.

"You can create high quality, rich and accessible PDFs using Adobe Create PDF cloud service.
Click Yes to create a rich PDF using this service
Click No to create a PDF without using this service"

1. Click the the "Yes" Button.

The first time you do this, nothing happens. The second time you do this it brings up this error message:

"A file conversion is already in progress. Please retry after that conversion is completed"

EXPECTED RESULT:
It makes a PDF.

OBSERVED RESULT:
It does nothing or give me that error mentioned above.

ENVIRONMENT (and conditions):
Mac OSX Sierra 10.12.6
License is an enterprise deal through our University that comes with Adobe CC and Acrobat DC

I have tried docs with one line, and I have tried docs with multiple pages, it will be the same result on my Mac.

I have trained about 25 people at my univeristy on this buggy product. This error happens on about 50% of peoples computers.

Please, don't tell me to reinstall. This is a clean install.

If I use the "Create PDF" button on my PC running Windows 10 it functions as expected. Most people at my University are on a Mac, so we can't just say use a PC.

This is a very urgent issue to fix at my university because we need to make our PDF files Accessible. This bug pretty much means half the people who need to make an Accessible PDF file from word can't do it.