I have attempted to print from the HP app
Are you attempting to print from your phone (iPhone?) via the "HP Smart" app?
I have attempted to print from the ... regular Microsoft application
What "regular Microsoft application" are you referring to? Is this application installed on your computer or on some other device?
Have you attempted to print from your computer using Notepad, WordPad, or Microsoft Word (if you have it installed)? If so, with what results? Please provide the complete text of any error messages.