CSS, JS, HTML Minify not working

Hi,

We installed W3 Total Cache, Cloudflare plugin on our wordpress site and also did the configuration on the cloudfare platform. But the minify is still not visible when we view source. Our website is https://hfse.edu.sg/. And our gtmetrix is showing Grade F

I can see that Minify is toggled, at least for CSS and JS, but it’s most likely a validation issue.