Acrobat Reader DC requires a font package to correctly display a .pdf file
Hi everybody,
I have a problem with Adobe Acrobat Reader DC. When I try to open a .pdf file Acrobat says that is required a font package to correctly display the document.
The screenshot of the pop-up is here:

When I click "OK", my browser says that is impossible to load the Internet page (the internet page is corrupted?).
So...What can I do with this issue? How can I download this required font package?
P.S. I look into my .pdf document's proprieties and the font that it uses are these:

I'm Italian and normaly I use the italian version of Adobe Reader DC on my Windows 10 PC.
