This question has been beaten to death, but I tried 10 times, closing / reopening the project and PhpStorm, cannot get it to resolve ...
[ Using 2018.1.6 on Ubuntu ( waiting for 2018.2.1 to upgrade...) ]
`/font` cannot be resolved as a Directory (and thus the font file that follows)
And in Settings / Directories, the dir `resources` that contains `font` is declared as a `Resource Root`
And the `font` dir contains the fonts
All files and dirs belong to me, there is no access problem.
Really don't know what to do next...