Hello @vmarko,
Thanks for your help.
I am using manual minify. I already added many css and js and it works fine for all of them. But for this specific file it does not work.
Here is page insight screenshot
https://pasteboard.co/HAI8By9.png
Here is w3 cache css path for this file :
https://pasteboard.co/HAI958A.png
I clicked the purge cache button but for this file it doesn’t change anything. Is it because it is generated by minify (the path is in cache/minify) I don’t know. I don’t know where this default.include.css come from.