I have received a warning from “Google Search Console Team” (previously called Google Webmaster Tools) with the title “Googlebot cannot access CSS and JS files on http://www.[website].com/“. I am sure many webmasters are concerned like I am as I see plenty of buzz in Twitter already.
The Google Webmaster Guidelines was updated last year in October which warned webmasters to not block access to JS and CSS file. It said
Below is the screenshot of the notification received
For those concerned, few things to note:
1) This is not a notification for penalty, but a warning that your site may get poor ranking if Google doesn’t see all of its content.
2) Several WordPress webmasters are receiving this notifications due to the reason that by default WordPress blocks /wp-includes/ folder in robots.txt file.
3) Follow the step by step instruction provided by Google; it would help finding out what/how Google sees your site by using the “Fetch as Google” tool.