It had nothing to do with Magick.net, or my rights.
I added new fonts (Pango doesn't seem to be able to use font files when I specify the path) to Windows\Fonts. IIS and the Task Manager are always running. So they weren't aware of the new fonts. Rebooting the server did the trick, though restarting those services would've probably worked too.
I added new fonts (Pango doesn't seem to be able to use font files when I specify the path) to Windows\Fonts. IIS and the Task Manager are always running. So they weren't aware of the new fonts. Rebooting the server did the trick, though restarting those services would've probably worked too.