GZIP, and Specify a Vary

[clev86]

GTMetrix report here: https://gtmetrix.com/reports/recherche-skincare.com/ZgMdOKLk

GZip

Already selected:

Enable gzip compression | Compressing resources with gzip reduce the number of bytes sent over the network

BUT, it seems GTMetrix has not detected it even after purging the website, and the CDN cache. We are using NuCDN.

Is there something we can do about this?

Background: Breeze was f-ing the website up by loading it as symbols, and breaking the code on a line of CSS, so we switched to WP Performance.

Specify a Vary

Not sure if we saw the Specify a Vary error in Breeze previously, but it came about when using WP Performance.

Is there a way to directly have this resolved using WP Performance?