I updated the latex manual with a "git pull" and now it no longer produces the pdf for me. I get the error: packages.tex Error 10: File `substitutefont.sty' not found. \usepackage In packages.tex I have, from line 9 to line 15: 9 \usepackage{substitutefont} % so we can use fonts other than those specified in babel 10 \usepackage[english]{babel} % default language for document 11 % Cyrillic - if it is used, no Small Caps are available: 12 %\usepackage[scaled=0.925]{XCharter} % Подключение русифицированных 13 % шрифтов XCharter "Connection 14 % of Russified XCharter Fonts" 15 \usepackage[bitstream-charter]{mathdesign} % Согласование Do you have any idea what could have happened? Lately I have had updates to both texlive and TexStudio, which I use to work on the manual. I found this link: https://ctan.org/pkg/substitutefont?lang=en