Title: Fatal Error when Accessing Admin
Last modified: August 19, 2016

---

# Fatal Error when Accessing Admin

 *  Resolved [wnyrealtor](https://wordpress.org/support/users/wnyrealtor/)
 * (@wnyrealtor)
 * [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/)
 * I am not sure this is the right place to ask, but I did something very wrong 
   on my blog… I upgraded to 2.3.3 this morning and I thought I followed the instructions
   correctly but I keep getting this error when I try and go into the admin side
   of my blog to follow the detailed instructions:
 * **Fatal error: Call to undefined function: wp_admin_css() in /data/15/1/123/54/
   1449869/user/1558055/htdocs/wnyrealtor/wp-admin/admin-header.php on line 20**
 * everything works on the front end, I cannot get back into the backend. Any suggestions?

Viewing 7 replies - 1 through 7 (of 7 total)

 *  [Jeremy Clark](https://wordpress.org/support/users/jeremyclark13/)
 * (@jeremyclark13)
 * [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/#post-693743)
 * Did you follow the [upgrade instructions](http://codex.wordpress.org/Upgrading_WordPress_Extended).
   Especially this [step](http://codex.wordpress.org/Upgrading_WordPress_Extended#Step_7:_Delete_the_old_WordPress_files).
 *  Thread Starter [wnyrealtor](https://wordpress.org/support/users/wnyrealtor/)
 * (@wnyrealtor)
 * [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/#post-693746)
 * I missed that step, should I go in and delete the files and try again?
 *  [Jeremy Clark](https://wordpress.org/support/users/jeremyclark13/)
 * (@jeremyclark13)
 * [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/#post-693748)
 * Yes follow the upgrade instructions above step by step especially the **BACKUP**
   step.
 *  Thread Starter [wnyrealtor](https://wordpress.org/support/users/wnyrealtor/)
 * (@wnyrealtor)
 * [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/#post-693753)
 * I can’t seem to get into the phpMyAdmin.
 *  Thread Starter [wnyrealtor](https://wordpress.org/support/users/wnyrealtor/)
 * (@wnyrealtor)
 * [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/#post-693756)
 * how do I deactivate the plugins without being able to get into the admin?
 *  [Jeremy Clark](https://wordpress.org/support/users/jeremyclark13/)
 * (@jeremyclark13)
 * [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/#post-693757)
 * Rename your plugin folder temporarily through ftp.
 *  Thread Starter [wnyrealtor](https://wordpress.org/support/users/wnyrealtor/)
 * (@wnyrealtor)
 * [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/#post-693759)
 * all fixed, thanks so much!!!!!!!!

Viewing 7 replies - 1 through 7 (of 7 total)

The topic ‘Fatal Error when Accessing Admin’ is closed to new replies.

## Tags

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 7 replies
 * 2 participants
 * Last reply from: [wnyrealtor](https://wordpress.org/support/users/wnyrealtor/)
 * Last activity: [18 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-accessing-admin/#post-693759)
 * Status: resolved

## Topics

### Topics with no replies

### Non-support topics

### Resolved topics

### Unresolved topics

### All topics