Title: ACF Error
Last modified: October 24, 2024

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# ACF Error

 *  [ovalhead](https://wordpress.org/support/users/ovalhead/)
 * (@ovalhead)
 * [1 year, 7 months ago](https://wordpress.org/support/topic/acf-error-2/)
 * Hello, I see this error when saving my post;
   ACF was unable to perform validation
   due to an invalid security nonce being provided.

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

 *  Moderator [Steven Stern (sterndata)](https://wordpress.org/support/users/sterndata/)
 * (@sterndata)
 * Volunteer Forum Moderator
 * [1 year, 7 months ago](https://wordpress.org/support/topic/acf-error-2/#post-18093902)
 * I recommend asking at [https://wordpress.org/plugins/advanced-custom-fields/#new-post](https://wordpress.org/plugins/advanced-custom-fields/#new-post)
   so the plugin’s developers and support community can help you with this.
 *  [Dilip Modhavadiya](https://wordpress.org/support/users/dilip2615/)
 * (@dilip2615)
 * [1 year, 7 months ago](https://wordpress.org/support/topic/acf-error-2/#post-18094212)
 * Hello [@ovalhead](https://wordpress.org/support/users/ovalhead/) ,
   The Error 
   message “ACF was unable to perform validation due to an invalid security nonce
   being provided” is a typically occurs due to security nonce validation issue 
   in WordPress.Here are steps to troubleshoot and resolve this issue:
    1. Clear Browser Cache.
    2. Check Theme or Plugin Conflict.
    3. Increase PHP Memory Limit.
       Copy code, and mention into the wp-config.phpdefine(‘
       WP_MEMORY_LIMIT’, ‘256M’);
    4. Update ACF and WordPress.
    5. Check for Nonce Expiry.
    6. Fix Nonce Verification Code,If you’ve customized any part of the ACF or WordPress
       backend, ensure the nonce verification code is correct. It should look like 
       this:
       wp_nonce_field( ‘acf_save_post’, ‘acf_nonce’ );
    7. Disable Object Caching.
    8. Check for Javascript Errors.
       If these steps don’t resolve the issue, let me 
       know and we can investigate further!
 *  [Clicknathan](https://wordpress.org/support/users/clicknathan/)
 * (@clicknathan)
 * [1 year, 7 months ago](https://wordpress.org/support/topic/acf-error-2/#post-18114373)
 * I was able to resolve this issue by removing the following code from functions.
   php, which was being used to try and show WP’s default custom fields interface
   even with ACF installed.
 * `// show default custom fields, even with ACF add_filter( 'acf/settings/remove_wp_meta_box','
   __return_false' );`

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

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

## Tags

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 4 replies
 * 4 participants
 * Last reply from: [Clicknathan](https://wordpress.org/support/users/clicknathan/)
 * Last activity: [1 year, 7 months ago](https://wordpress.org/support/topic/acf-error-2/#post-18114373)
 * Status: not resolved

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