Failed to load content css (fontawesome) after WP4.8 update

Hello.

After updating to wp4.8 I get the following error when adding a new page or post:

Failed to load content css: ###SITEURL###//cdn.jsdelivr.net/fontawesome/4.7.0/css/font-awesome.min.css

This only happens on my websites with version 1.8 of wp less
I have installed an older version of wp less (1.7.5) and the error is gone.
Something must be going wrong with the include root path because its being placed after the website url

How can i fix this?

Thanks in advance.