Plugin installed but does not create the wpfc-minified folder

Hello
WP Fastest Cache worked correctly on my site, but from one moment to another I noticed a change in performance. I re-installed the plugin, but checking the cache folders I found that the “wpfc-minified” folder was not created and it did not exist in the path /home/misite/public_html/wp-content/cache/wpfc-minified.

I verified that there are files cache in this folder /home/mysite/public_html/wp-content/cache/all

I also verified that yes I have activated the minify options of css and JS, as well as Gzip.

Thanks for you support