Title: Undefined array key “nonce”
Last modified: March 3, 2025

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# Undefined array key “nonce”

 *  [ewerkstatt](https://wordpress.org/support/users/ewerkstatt/)
 * (@ewerkstatt)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/undefined-array-key-nonce/)
 * Some pages or custom post types show a blank screen, the cache must be renewed
   for that page. In the WP errorlog then the PHP warning shows up:
   [03-Mar-2025
   11:43:15 UTC] PHP Warning: Undefined array key “nonce” in /******/wp-content/
   plugins/swift-performance-lite/includes/promo/promo.php on line 29We cannot find
   out the circumstances when the cache works for the mayority of pages and custom
   post types, and when/why the page or CPT ist just blank.

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## Tags

 * [nonce](https://wordpress.org/support/topic-tag/nonce/)

 * 0 replies
 * 1 participant
 * Last reply from: [ewerkstatt](https://wordpress.org/support/users/ewerkstatt/)
 * Last activity: [1 year, 3 months ago](https://wordpress.org/support/topic/undefined-array-key-nonce/)
 * Status: not resolved