developer

I left the ‘Metabox callback’ blank, and it’s resolved now.
Thanks,

Thank for reply.

I have added Media post type.

• This reply was modified 1 month ago by developer.

Do you have any custom taxonomies in TaxoPress

Reply  : yes,

Does it help if you disable them?

Reply: yes, I disabled taxopress.

Does it help if you change the theme?

Reply: no, same issue coming 

Does it help if you disable the other plugins one-by-one?

Reply: No, Same issue coming but if taxopress disable then working.

Hi,
I’m getting an error when creating a new post while the plugin is enabled. It worked fine before with PHP 7, but it’s not functioning properly with PHP 8.1.

Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, function “category_name” not found or invalid function name in /wp-admin/includes/template.php:1456 Stack trace: #0 wp-admin/edit-form-advanced.php(716): do_meta_boxes(Object(WP_Screen), ‘side’, Object(WP_Post)) #1 wp-admin/post-new.php(75): require(‘/Applications/X…’) #2 {main} thrown in?wp-admin/includes/template.php?on line?1456