Title: Params verification failed
Last modified: March 25, 2019

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# Params verification failed

 *  Resolved [unalgu](https://wordpress.org/support/users/unalgu/)
 * (@unalgu)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/params-verification-failed/)
 * Thank you for a wonderful plugin – we are however getting error message on some
   of the pages looking like this:
 * \tbundler\tKibo\\Phast\\Services\\Bundler\\Service\tParams verification failed
   for set 0, referer: [https://www.society19.com/famous-alumni-from-purdue-university/](https://www.society19.com/famous-alumni-from-purdue-university/)
 * can you help
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fparams-verification-failed%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Author [Albert Peschar](https://wordpress.org/support/users/kiboit/)
 * (@kiboit)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/params-verification-failed/#post-11353712)
 * Hi unalgu,
 * Thanks for trying out PhastPress.
 * It looks like you’re using a caching plugin. Could you empty the plugin cache
   and try again?
 * –Albert
 * P.S.: If you like PhastPress, I would really appreciate it [if you left a review here](https://wordpress.org/support/plugin/phastpress/reviews/#new-post).
 *  Thread Starter [unalgu](https://wordpress.org/support/users/unalgu/)
 * (@unalgu)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/params-verification-failed/#post-11354385)
 * Cleared all cache (manually deleted plugin cache as well. No change still getting
   the error messages. We are using w3 total cache if that helps.
 * If it is not compatible with the caching software we are using please let us 
   know.
 * Love the plugin less the warning messages. If you can fix will leave a 10 star
   review
 *  Plugin Author [Albert Peschar](https://wordpress.org/support/users/kiboit/)
 * (@kiboit)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/params-verification-failed/#post-11356449)
 * Hey unalgu,
 * Sorry, I think my message was unclear. I understand you deleted this:
    - W3 Total Cache full-page cache
    - PhastPress cache folder
 * When PhastPress is used, it generates a token (a kind of password) that is used
   to sign the URLs for images, CSS, JS, etc., to avoid changing the URLs (allowing
   users to overload the server by resizing images, etc.).
 * You should **not** empty the PhastPress because it resets the token. If someone
   loads a page before you do the reset, that page will have the old token in the
   full-page cache, then you empty the PhastPress cache, and the token is reset.
   Those pages in the full-page cache with the old token no longer work.
 * So could you try again to empty **only** the W3 Total Cache? Please let me know
   how it goes– if you still have the issue I’ll make sure it gets fixed.
 * –Albert
    -  This reply was modified 7 years, 2 months ago by [Albert Peschar](https://wordpress.org/support/users/kiboit/).
      Reason: Formatting
 *  Thread Starter [unalgu](https://wordpress.org/support/users/unalgu/)
 * (@unalgu)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/params-verification-failed/#post-11358387)
 * Albert,
 * Thank you so much for your quick responses. The issue still remains – even after
   deletion of the cache files.
 * Please let me know if you need any additional information from me for a potential
   fix.
 * Thank you.
 *  Plugin Author [Albert Peschar](https://wordpress.org/support/users/kiboit/)
 * (@kiboit)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/params-verification-failed/#post-11359001)
 * Hi unalgu,
 * Can you confirm that you deleted **only the W3 Total Cache files**? Because it
   seems that it’s still a full-page caching issue. Are you clearing the cache via
   the W3 Total Cache settings, or otherwise?
 * For example, I see the issue on this URL:
 * [https://www.society19.com/](https://www.society19.com/)
 * But not when I add a random parameter to avoid the cache:
 * [https://www.society19.com/?2019](https://www.society19.com/?2019)
 * If you did indeed only clear the W3 Total Cache again, and the issue persists,
   could you install the [Health Check plugin](https://wordpress.org/plugins/health-check/)
   and post the debug information and paste it here? ([See instructions.](https://make.wordpress.org/support/handbook/appendix/troubleshooting-using-the-health-check/))
 * –Albert

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Params verification failed’ is closed to new replies.

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 * 5 replies
 * 2 participants
 * Last reply from: [Albert Peschar](https://wordpress.org/support/users/kiboit/)
 * Last activity: [7 years, 2 months ago](https://wordpress.org/support/topic/params-verification-failed/#post-11359001)
 * Status: resolved