Title: Fatal Error When Setting Up Multisite
Last modified: September 22, 2017

---

# Fatal Error When Setting Up Multisite

 *  [corinnew](https://wordpress.org/support/users/corinnew/)
 * (@corinnew)
 * [8 years, 8 months ago](https://wordpress.org/support/topic/fatal-error-when-setting-up-multisite/)
 * Hello,
 * I am attempting to set my site up as a multisite, but when I add:
 * /* Multisite */
    define( ‘WP_ALLOW_MULTISITE’, true );
 * to my wp-config.php file and then try to navigate back to my site I get a ton
   of letters and numbers and this message in bold:
 * Call to undefined function nocache_headers() in /home/norpac/public_html/wp-admin/
   admin.php on line 33
 * How do I fix this?

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [opsec](https://wordpress.org/support/users/opsec/)
 * (@opsec)
 * [8 years, 8 months ago](https://wordpress.org/support/topic/fatal-error-when-setting-up-multisite/#post-9521835)
 * A good first step is to make sure all plugins are deactivated and a default Twenty*
   theme is activated. This will rule out plugins or themes causing this problem.
 * Also see, [https://codex.wordpress.org/Create_A_Network](https://codex.wordpress.org/Create_A_Network)
 * Hope that helps some. If you still have trouble you can paste the errors into
   [http://wpbin.io/](http://wpbin.io/) and paste that unique link back here.
 *  Thread Starter [corinnew](https://wordpress.org/support/users/corinnew/)
 * (@corinnew)
 * [8 years, 8 months ago](https://wordpress.org/support/topic/fatal-error-when-setting-up-multisite/#post-9529205)
 * Hello!
 * I have created a staging area that is a clone of my website. I have deactivated
   all the plugins and put it to a Twenty theme. I am still getting this error [http://wpbin.io/etf0p7](http://wpbin.io/etf0p7)

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Fatal Error When Setting Up Multisite’ is closed to new replies.

 * In: [Networking WordPress](https://wordpress.org/support/forum/multisite/)
 * 2 replies
 * 2 participants
 * Last reply from: [corinnew](https://wordpress.org/support/users/corinnew/)
 * Last activity: [8 years, 8 months ago](https://wordpress.org/support/topic/fatal-error-when-setting-up-multisite/#post-9529205)
 * Status: not resolved

## Topics

### Topics with no replies

### Non-support topics

### Resolved topics

### Unresolved topics

### All topics