Investigate logs "Failed to read resource [font-awesome/4.7.0/fonts/fontawesome-webfont.woff2]"

The Univention team is reporting many error logs on their test instance (based on project version 0.3 ; XWiki 14.10.2) :

org.xwiki.resource.ResourceReferenceHandlerException: Failed to read resource [font-awesome/4.7.0/fonts/fontawesome-webfont.woff2]

The idea is to check the cause and see if we can avoid showing these logs.