Acrobat DC Convert Webpage to PDF Fails

I have Windows 10, Firefox and using Acrobat DC.  The aforementioned software is current. The convert webpage  to PDF features fails often.  Not as routine as it use to be.

Currently, when converting a webpage to PDF, the execution completes, but the pages are blank, except for the title and url info listed in the header and footer respectively.

Also, underneath the header, the message: "You are using an outdated version of Internet Explorer. For a faster, safer browsing experience" is displayed.  I don't use IE, never have, in fact I removed it from my computer.

Any Ideas?