Title: missing a cache validator
Last modified: June 25, 2018

---

# missing a cache validator

 *  Resolved [sonriseapartments](https://wordpress.org/support/users/sonriseapartments/)
 * (@sonriseapartments)
 * [7 years, 11 months ago](https://wordpress.org/support/topic/missing-a-cache-validator-3/)
 * Hi PS Ninja
 * I’m getting this report back from pingdom:
    The following resources are missing
   a cache validator. Resources that do not specify a cache validator cannot be 
   refreshed efficiently. Specify a Last-Modified or ETag header to enable cache
   validation for the following resources: [https://www.test1.sonriseapartments.com/s/261e69.js](https://www.test1.sonriseapartments.com/s/261e69.js)
   [https://www.test1.sonriseapartments.com/s/40d1ff.css](https://www.test1.sonriseapartments.com/s/40d1ff.css)
   [https://www.test1.sonriseapartments.com/s/c4bfee.css](https://www.test1.sonriseapartments.com/s/c4bfee.css)
 * I have read in the support forum that this issue was fixed in a update
    but I
   still seem to be experiencing this issue with my new theme (Generatpress Premium)
   any input would be appreciated Ron
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fmissing-a-cache-validator-3%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [Denis Ryabov](https://wordpress.org/support/users/dryabov/)
 * (@dryabov)
 * [7 years, 11 months ago](https://wordpress.org/support/topic/missing-a-cache-validator-3/#post-10434420)
 * It is the feature, because of any changes in source files result in new file 
   name in the “s” directory (e.g. 261e69.js in your examples), and cache validation
   is not necessary in this case. This allow to save several useless requests to
   the server.
 *  Thread Starter [sonriseapartments](https://wordpress.org/support/users/sonriseapartments/)
 * (@sonriseapartments)
 * [7 years, 11 months ago](https://wordpress.org/support/topic/missing-a-cache-validator-3/#post-10434472)
 * Thanks Denis for the quick reply
    Your PS Ninja is one of the best page speed
   plugins out there Ron
 *  Plugin Author [Denis Ryabov](https://wordpress.org/support/users/dryabov/)
 * (@dryabov)
 * [7 years, 11 months ago](https://wordpress.org/support/topic/missing-a-cache-validator-3/#post-10434494)
 * Thank you!

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘missing a cache validator’ is closed to new replies.

 * ![](https://ps.w.org/psn-pagespeed-ninja/assets/icon.svg?rev=1722219)
 * [PageSpeed Ninja - Cache, Minify, Defer CSS JavaScript, Critical CSS, Optimize Images, Convert WebP](https://wordpress.org/plugins/psn-pagespeed-ninja/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/psn-pagespeed-ninja/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/psn-pagespeed-ninja/)
 * [Active Topics](https://wordpress.org/support/plugin/psn-pagespeed-ninja/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/psn-pagespeed-ninja/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/psn-pagespeed-ninja/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [Denis Ryabov](https://wordpress.org/support/users/dryabov/)
 * Last activity: [7 years, 11 months ago](https://wordpress.org/support/topic/missing-a-cache-validator-3/#post-10434494)
 * Status: resolved