Title: Cache Error
Last modified: January 25, 2023

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# Cache Error

 *  Resolved [wafwaf](https://wordpress.org/support/users/wafwaf/)
 * (@wafwaf)
 * [3 years, 4 months ago](https://wordpress.org/support/topic/cache-error-20/)
 * Hi,
 * We’re getting this error message when we upgrade to your newest version:
 * “Notice: Function WP_Object_Cache::add was called incorrectly. Cache key must
   not be an empty string. Please see Debugging in WordPress for more information.(
   This message was added in version 6.1.1.)
 * This error only comes up when the plugin is activated. Can you please fix? Thank
   you.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Thread Starter [wafwaf](https://wordpress.org/support/users/wafwaf/)
 * (@wafwaf)
 * [3 years, 4 months ago](https://wordpress.org/support/topic/cache-error-20/#post-16463957)
 * .
    -  This reply was modified 3 years, 4 months ago by [wafwaf](https://wordpress.org/support/users/wafwaf/).
 *  Thread Starter [wafwaf](https://wordpress.org/support/users/wafwaf/)
 * (@wafwaf)
 * [3 years, 3 months ago](https://wordpress.org/support/topic/cache-error-20/#post-16506512)
 * We reverted back to Version 5.12.1 and it is not returning any errors. Can you
   please look into this?

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Cache Error’ is closed to new replies.

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 * 2 replies
 * 1 participant
 * Last reply from: [wafwaf](https://wordpress.org/support/users/wafwaf/)
 * Last activity: [3 years, 3 months ago](https://wordpress.org/support/topic/cache-error-20/#post-16506512)
 * Status: resolved