Compress Transfer N/A. Why?

Result of the test: https://www.webpagetest.org/result/180216_9Z_c10e286fc89f5bc434e89b3b85b2896b/

Result on main page for the Compress Transfer is N/A.
The text for it in the Performance Review tab is:
“Use gzip compression for transferring compressable responses: N/A”

a) I checked if I had gzip compression on with Chromes DevTools and it shows it as HAVING gzip compression.
b) Also checked for gzip compression via Check GZIP compression (https://checkgzipcompression.com/) Result of this check: It is compressed.
c) checked old logs of webpagetest.org tests and there result for Compress Transfer is an A!

What is the reason for the N/A now?

https://gtmetrix.com/reports/www.themespice.nl/CRi0NvyS
It’s fine. You only have one external script that isn’t gzipped and it’s up to them whether they do it or not.
Compressing https://freegeoip.io/json/?callback=jQuery11240686638512173994_1518992323932&_=1518992323933 could save 66B (24% reduction).

Thanks for that avalanch!

Good to know that Gtmetrix provides the missing info as to the gzip compression.