Title: Nonce failed errors Last modified: July 18, 2019 --- # Nonce failed errors * [now4dw](https://wordpress.org/support/users/now4dw/) * (@now4dw) * [6 years, 10 months ago](https://wordpress.org/support/topic/nonce-failed-errors/) * Good morning Thomas. * This site displays an intermittent (dare I say random), ‘Nonce failed’ error message. I have not been able to replicate it but I have numerous screenshots from the client. It is not browser dependent and has occurred on all devices ( desktop, tablet and mobile). * The debug log reports the following: * [18-Jul-2019 21:34:55 UTC] PHP Notice: Undefined index: is_safari in /home/u379715372/ domains/logancitywhs.wiki/public_html/wp-content/plugins/file-away/lib/cls/class. fileaway_definitions.php on line 29 * The plugin is installed at network level. I will today activate it only at site level to see if that makes a difference but I am hoping you can provide some insight. * Thanks in advance. * DW * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fnonce-failed-errors%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 4 replies - 1 through 4 (of 4 total) * Plugin Author [thomstark](https://wordpress.org/support/users/thomstark/) * (@thomstark) * [6 years, 10 months ago](https://wordpress.org/support/topic/nonce-failed-errors/#post-11746635) * Do you use SSL on your site? If so, is it enabled in the admin but not the front end? Are you forcing it at both ends? * Thread Starter [now4dw](https://wordpress.org/support/users/now4dw/) * (@now4dw) * [6 years, 9 months ago](https://wordpress.org/support/topic/nonce-failed-errors/#post-11843593) * Hi again Thomas. The short answer is that I have tried and tested everything but keep coming back to FileAway as the root of the problem – but only because it is the ONE plugin that can’t be deactivated since it is THE key tool used on the site. * Clearing the cache ‘seems’ to provide a temporary fix and I also suspect that the (front end) users of this site rarely close their browser. * I use Hummingbird from WPMUDev as my caching tool but they have no reports of similar issues and they have also confirmed that my settings are correct. I also use Cloudflare but so do millions of others and I can’t find anything there. * The mega challenge is that it is impossible to force the error. It simply occurs randomly. While I doubt that it will help you, the error message can be seen at [https://screenpresso.com/=S2xWc](https://screenpresso.com/=S2xWc) * Other active plugins on the site are: * Classic editor (tested) Defender Pro (tested) Easy Sidebar Menu Widget (tested) Easy Theme and Plugin Upgrades (tested) Elementor/Elementor Pro (Tested) Heartbeat Control (tested) Hummingbird Pro (tested) MimeTypes Link Icons (tested) Native PHP Sessions for WordPress (recently added as a possible solution) Ocean Extra( tested) Ocean Hooks (tested) PDF Embedder (tested) Slimstat Analytics (tested) Smush Pro (tested) WP Better Attachments (tested) WPMU DEV Dashboard (tested) * Note that when I say ‘tested’, no errors were reported when those plugins were deactivated but given the random nature of the error, I can’t be certain. * Any suggestions or advice will be most welcome as this is consuming many hours and is getting the client offside 🙁 * Thanks in advance. * Plugin Author [thomstark](https://wordpress.org/support/users/thomstark/) * (@thomstark) * [6 years, 9 months ago](https://wordpress.org/support/topic/nonce-failed-errors/#post-11843660) * Well you shouldn’t be caching pages where the fileaway shortcode is used anyway. The file table is dynamic, not static. * It’s caching your nonce, which is a security string generated based on the time and user, among other elements. That is stored in a script on the page. * You need to tell your caching utilities not to cache pages where fileaway is in use. * Thread Starter [now4dw](https://wordpress.org/support/users/now4dw/) * (@now4dw) * [6 years, 9 months ago](https://wordpress.org/support/topic/nonce-failed-errors/#post-11843710) * Thanks for the super-quick response Thomas! Hummingbird is set to only cache static content but perhaps it sees the FileAway content as static??? * I had previously deactivated it (Hummingbird) entirely and still had the error reported during that deactivation and actually reactivated it (at the client’s request) so that they could ‘clear the cache’. * I’ll also remove the site from Cloudflare for a time and see if that helps. Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘Nonce failed errors’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/file-away_e3e2e1.svg) * [File Away](https://wordpress.org/plugins/file-away/) * [Support Threads](https://wordpress.org/support/plugin/file-away/) * [Active Topics](https://wordpress.org/support/plugin/file-away/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/file-away/unresolved/) * [Reviews](https://wordpress.org/support/plugin/file-away/reviews/) * 4 replies * 2 participants * Last reply from: [now4dw](https://wordpress.org/support/users/now4dw/) * Last activity: [6 years, 9 months ago](https://wordpress.org/support/topic/nonce-failed-errors/#post-11843710) * Status: not resolved