Exactly what website is directing you to click a button to install a font package? Are you referring to an Adobe website from which you are licensing fonts? If so, you may get a link to download the font files, but the resultant font file (often in a .ZIP file) is something that you need to install on your system yourself.
If this is some other website, sorry, we can't help you here!
Likewise, we have no idea what you mean by “What font package is needed?” We have no context to respond to that type of question.
- Dov Isaacs, former Adobe Principal Scientist (April 30, 1990 - May 30, 2021)