• I use W3TC on my site along with Cloudflare and everything has been set according to this site. It used to work perfectly without any issue but a couple weeks ago there has been a following error:

    Recently an error occurred while creating the CSS / JS minify cache: GET[‘f’] param part invalid: “”

    I also had my site check on Google PageSpeed Insight. It suggested my to Remove render-blocking JavaScript and Optimize CSS Delivery for my plugins.

    I’ve tried to clear cache and disable Cloudflare but the problem still persists. Does anyone know the cause of this problem

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