If you see the message on the Google Search Console regarding your Joomla website  "Googlebot can't access CSS and JS files", then it's enough to do one simple trick to solve the problem. 

Add the following code to the robots.txt file of your Joomla site.

#Googlebot
User-agent: Googlebot
Allow: *.css
Allow: *.js

Watch the short video guide and follow the step by step tutorial.

Easy? Please rate and share, thanks!