[Rdo-list] Error showing up in the httpd log file

Hi all, I've just got a Kilo installation with packstack and I can see in the httpd logs errors like this: ERROR:scss.expression:Function not found: twbs-font-path:1 ERROR:scss.expression:Function not found: twbs-font-path:1 Any hints what may be causing it? Horizon appears to be working ok. Thanks, Marius