If you are trying to edit a PDF and getting a "CIDFont+F1 cannot be found" error, you can try these workarounds: Impossible fonts to be found / Fontes impossíveis de achar
To understand why you can't simply "download" a font named CID Font F1 , you first need to understand the technology. Cid Font F1 F2 F3 F4 Free Download
Cid Font F1 F2 F3 F4: A Comprehensive Guide to Free Download If you are trying to edit a PDF