Title: WordPress Update: function not found or invalid
Last modified: January 26, 2022

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# WordPress Update: function not found or invalid

 *  [bighrts](https://wordpress.org/support/users/bighrts/)
 * (@bighrts)
 * [4 years, 4 months ago](https://wordpress.org/support/topic/wordpress-update-function-not-found-or-invalid/)
 * Hello,
 * Updated WordPress to version 5.9 and immediately received an error on a working
   website without errors.
 * `Warning: call_user_func_array() expects parameter 1 to be a valid callback, 
   function '_disable_block_editor_for_navigation_post_type' not found or invalid
   function name in /.../wp-includes/class-wp-hook.php on line 307`
 * Using the String Locator, I searched to see if this error was associated with
   a particular plugin. It’s not.
 * **Its found only in the following places:**
 * wp-includes/default-filters.php _on line 588_
    wp-admin/includes/post.php _on
   line 2470_
 * All plugins are updated. I’m still looking, but it doesn’t seem to be a plugin
   conflict.
 * I’ll have to roll back my WordPress update to the old version, but I’m also concerned
   about updating in the future.
 * Any suggestions?
    -  This topic was modified 4 years, 4 months ago by [bighrts](https://wordpress.org/support/users/bighrts/).
    -  This topic was modified 4 years, 4 months ago by [Yui](https://wordpress.org/support/users/fierevere/).

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [Dave](https://wordpress.org/support/users/dvaer/)
 * (@dvaer)
 * [4 years, 4 months ago](https://wordpress.org/support/topic/wordpress-update-function-not-found-or-invalid/#post-15292632)
 * Just a quick thought – what about themes? Have you tried a default theme?
 *  Thread Starter [bighrts](https://wordpress.org/support/users/bighrts/)
 * (@bighrts)
 * [4 years, 4 months ago](https://wordpress.org/support/topic/wordpress-update-function-not-found-or-invalid/#post-15294228)
 * I haven’t checked the theme yet. I’ll do that later tonight.
    In the meantime,
   two other threads with the same issue have popped up:
 * [https://wordpress.org/support/topic/error-after-5-9-update-_disable_block_editor_for_navigation_post_type/](https://wordpress.org/support/topic/error-after-5-9-update-_disable_block_editor_for_navigation_post_type/)
 * [https://wordpress.org/support/topic/_disable_block_editor_for_navigation_post_type/](https://wordpress.org/support/topic/_disable_block_editor_for_navigation_post_type/)
 *  [krisseeuw](https://wordpress.org/support/users/krisseeuw/)
 * (@krisseeuw)
 * [4 years, 4 months ago](https://wordpress.org/support/topic/wordpress-update-function-not-found-or-invalid/#post-15296601)
 * Same problem here.
 * I found 2 plug-in conflicts:
    1. Tutor LMS (they are working on a fix) 2. wp_all_import
 *  [mightysquirrel](https://wordpress.org/support/users/mightysquirrel/)
 * (@mightysquirrel)
 * [4 years, 4 months ago](https://wordpress.org/support/topic/wordpress-update-function-not-found-or-invalid/#post-15299063)
 * Yup, same here.
    Has anyone found a solution yet?
 *  [campusodontologico](https://wordpress.org/support/users/campusodontologico/)
 * (@campusodontologico)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/wordpress-update-function-not-found-or-invalid/#post-15312303)
 * I have the same problem!
    But now I can’t access my dashboard it shows this
 *     ```
       Warning: call_user_func_array() expects parameter 1 to be a valid callback, function '_disable_block_editor_for_navigation_post_type' not found or invalid function name in /homepages/10/d832147324/htdocs/ampusodontologico/wp-includes/class-wp-hook.php on line 307
   
       Warning: Cannot modify header information - headers already sent by (output started at /homepages/10/d832147324/htdocs/ampusodontologico/wp-includes/class-wp-hook.php:307) in /homepages/10/d832147324/htdocs/ampusodontologico/wp-includes/pluggable.php on line 1355
   
       Warning: Cannot modify header information - headers already sent by (output started at /homepages/10/d832147324/htdocs/ampusodontologico/wp-includes/class-wp-hook.php:307) in /homepages/10/d832147324/htdocs/ampusodontologico/wp-includes/pluggable.php on line 1358
       ```
   
 * Help me please!!

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘WordPress Update: function not found or invalid’ is closed to new replies.

## Tags

 * [call_user_func_array](https://wordpress.org/support/topic-tag/call_user_func_array/)
 * [class-wp-hook.php](https://wordpress.org/support/topic-tag/class-wp-hook-php/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 5 replies
 * 5 participants
 * Last reply from: [campusodontologico](https://wordpress.org/support/users/campusodontologico/)
 * Last activity: [4 years, 3 months ago](https://wordpress.org/support/topic/wordpress-update-function-not-found-or-invalid/#post-15312303)
 * Status: not resolved

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