No web fonts in cached pages

Please take a look at the following tutorial.

https://www.wpfastestcache.com/tutorial/cdn-font-problem/

I edited the .htaccess and that caused my website to 500 Internal Server Error.
I restored the file – but my website still in error 500.

please help

https://www.maxcdn.com/one/tutorial/how-to-use-cdn-with-webfonts/