Reply To: ACF unable to perform validation due to an invalid security nonce?

• clicknathan

• October 31, 2024 at 2:47 pm

Also experiencing this, ACF 6.3.9.

for me it’s happening on a page with many, many ACF fields.

I was able to resolve the issue by removing this code (used to bring back default Custom Fields meta boxes):

// show default custom fields, even with ACF
add_filter( 'acf/settings/remove_wp_meta_box', '__return_false' );