Hello,
I use quark-theme, but I have this error while using ::before in my menu
downloadable font: no supported format found (font-family: "FontAwesome" style:normal weight:400 stretch:100 src index:5) source: (end of source list)
If I change the unicode of the icon or if I check the folder user/themes/quark/css , I found no solution...
Thank you for help !