Acrobat Reader DC cannot open because it is not a supported file type

[Penny24678179ucv9]

Since installing Adobe Pro, I have had no issues printing our invoices from our billing program.  I print, then save as pdfs.  This morning I am receiving this message.

I have re-booted and tried everything I can think of.  Please help.  I cannot afford to be slowed down here.  Thanks so much!

[JR Boulay]

This PDF file is dammaged, you should get a new one.

[Penny24678179ucv9]

The thing is, it's not a pdf file at this point.  All I am trying to do it print from our program.  Once I print, then I save as a pdf.  It won't even open. I have tried it with a second invoice I created and same thing.  We only installed Adobe last week and have had no issues so I have no idea what has changed over the weekend.