Bizare font and slow

hi all,
I use scrivener since month on mac and since yesterday I also use it on new surface go 2 (windows) but I had this desagreable surprise

As you can see, all font ( here time new roman) are empty. I tried to change and reload, but nothing, I reinstalled scrivener, nothing.
any idea.

little precision, I use dropbox to manipulate the file on mac or on windows. dunno if that play


Try selecting this text and using the Format ▸ Font ▸ Outline toggle.

Dropbox just copies files around for you. It’s hardly any different from copying a project from one computer to another with a thumb drive.