Title: WordPress Upgrade Problem
Last modified: August 19, 2016

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# WordPress Upgrade Problem

 *  [giuliodetti](https://wordpress.org/support/users/giuliodetti/)
 * (@giuliodetti)
 * [15 years, 10 months ago](https://wordpress.org/support/topic/wordpress-upgrade-problem-2/)
 * Hi,
 * I upgraded from wp 3.0 to wp 3.01 and i had this problem in the admin section:
 * Fatal error: Call to a member function add_rewrite_tag() on a non-object in /
   mounted-storage/home119c/sub009/sc18587-YDFT/www/wp-includes/taxonomy.php on 
   line 289
 * do you know why, and how to solve it?…
 * Thanks

Viewing 1 replies (of 1 total)

 *  [esmi](https://wordpress.org/support/users/esmi/)
 * (@esmi)
 * [15 years, 10 months ago](https://wordpress.org/support/topic/wordpress-upgrade-problem-2/#post-1642547)
 * Try:
    – switching to the default theme by renaming your current theme’s folder
   using [FTP](http://codex.wordpress.org/FTP_Clients) or whatever file management
   application your host provides.
 * – [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 or phpMyAdmin.

Viewing 1 replies (of 1 total)

The topic ‘WordPress Upgrade Problem’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [esmi](https://wordpress.org/support/users/esmi/)
 * Last activity: [15 years, 10 months ago](https://wordpress.org/support/topic/wordpress-upgrade-problem-2/#post-1642547)
 * Status: not resolved

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