I just updated my MiKTeX packages (and also did FNDB refreshes,
updmap and everything and also already tried a complete fresh install), but now I suddenly get loads of errors telling me that my fonts are not found, for example:
fontspec error: "font-not-found" The font "Philosopher-Regular" cannot be found.
At first I thought that some packages are missing because of the November Package Refactoring (https://miktex.org/alert/package-refactoring-2016-11). But for some of my fonts this can't be the reason, because I load some font files like this, which also triggers this error:
And these files are in my git repository (and it compiled just fine before the update on the exact same code).
What ways do I have to attack this error?