Title: Random Fatal Errors
Last modified: September 5, 2016

---

# Random Fatal Errors

 *  [Cealin](https://wordpress.org/support/users/cealin/)
 * (@cealin)
 * [9 years, 8 months ago](https://wordpress.org/support/topic/random-fatal-errors/)
 * Hello,
 * About two times a week my website gets random fatal errors. Removing the /wp-
   includes/ map and uploading a fresh one temporarily fixes the error.
 * Error examples:
 *     ```
       Fatal error: Uncaught Error: Class 'WP_User_Meta_Session_Tokens' not found in /domain.com/htdocs/www/wp-includes/session.php:51 Stack trace: #0 
       /domains/blank.com/htdocs/www/wp-includes/pluggable.php(855): WP_Session_Tokens::get_instance(1) #1 /domain.com/htdocs/www/wp-includes/user.php(95): wp_set_auth_cookie(1, false, false) #2 /domain.com/htdocs/www/wp-login.php(796): wp_signon(Array, false) #3 {main} thrown in /domain.com/htdocs/www/wp-includes/session.php on line 51
       ```
   
 * ‘Fatal error: Uncaught Error: Call to undefined function is_blog_installed() 
   in /domain.com/htdocs/htdocs/www/wp-includes/widgets.php:1439 Stack trace: #0/
   domain.com/htdocs/htdocs/www/wp-includes/plugin.php(524): wp_widgets_init(”) #
   1 /domain.com/htdocs/htdocs/www/wp-settings.php(411): do_action(‘init’) #2 /domain.
   com/htdocs/htdocs/www/wp-config.php(90): require_once(‘/home/vhosting/…’) #3 /
   domain.com/htdocs/htdocs/www/wp-load.php(39): require_once(‘/home/vhosting/…’)#
   4 /domain.com/htdocs/htdocs/www/wp-blog-header.php(13): require_once(‘/home/vhosting/…’)#
   5 /domain.com/htdocs/htdocs/www/index.php(17): require(‘/home/vhosting/…’) #6{
   main} thrown in /domain.com/htdocs/htdocs/www/wp-includes/widgets.php on line
   1439′
 * What might be causing these errors? I use WordPress 4.6, RealHomes theme 2.6,
   plugins: Advanced Access Manager / Akismet / Contact Form 7 / MailPoet – Contact
   Form 7 Integration / MailPoet Newsletters / MailPoet Newsletters Premium / SMTP/
   Yoast SEO.

Viewing 1 replies (of 1 total)

 *  Moderator [t-p](https://wordpress.org/support/users/t-p/)
 * (@t-p)
 * [9 years, 8 months ago](https://wordpress.org/support/topic/random-fatal-errors/#post-8139972)
 * – deactivating ALL (yes all) plugins temporarily to see if this resolves the 
   problem (plugin functions can interfere). If this works, re-activate them individually(
   one-by-one) to find the problematic plugin(s).
    – If you can’t get into your 
   admin dashboard, try [resetting the plugins folder](http://codex.wordpress.org/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F)
   by [FTP](http://codex.wordpress.org/FTP_Clients). Sometimes, an apparently inactive
   plugin can still cause problems. Also remember to deactivate any plugins in the
   mu-plugins folder (if you have created such folder). The easiest way is to rename
   that folder to mu-plugins-old. – switching to the unedited default Theme (Twenty
   Sixteen, etc.) for a moment using the WP dashboard to rule out any theme-specific
   issue (theme functions can interfere like plugins). If you don’t have access 
   to your admin area, use [FTP ](http://codex.wordpress.org/FTP_Clients), or your
   web-host’s cPanel or whatever file management application your host provides (
   no Dashboard access required). Navigate to /wp-content/themes/ and switch to 
   the default theme by renaming your current theme’s folder by adding “-old” to
   the end of the folder name. Alternately, you can remove other themes except the
   default theme. That will force your site to use it. – If all the above steps 
   do not resolve the issue, then try **MANUALLY** updating. Download a fresh copy
   of the WordPress .zip file to your computer, unzip it, and use that to copy up
   all files and folders **EXCEPT the wp-config.php file and the /wp-content/ directory.**
   You may need to delete the old wp-admin and wp-includes folders and files on 
   your server before uploading the new ones. Please read the [Manual Update](http://codex.wordpress.org/Updating_WordPress#Manual_Update)
   directions first.

Viewing 1 replies (of 1 total)

The topic ‘Random Fatal Errors’ is closed to new replies.

## Tags

 * [fatal errors](https://wordpress.org/support/topic-tag/fatal-errors/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [t-p](https://wordpress.org/support/users/t-p/)
 * Last activity: [9 years, 8 months ago](https://wordpress.org/support/topic/random-fatal-errors/#post-8139972)
 * Status: not resolved

## Topics

### Topics with no replies

### Non-support topics

### Resolved topics

### Unresolved topics

### All topics