Title: Post Upgrade Error
Last modified: August 20, 2016

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# Post Upgrade Error

 *  [Miscy](https://wordpress.org/support/users/miscy/)
 * (@miscy)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/post-upgrade-error/)
 * Hi Chouby,
 * Whenever I install a plugin I got the following error:
 * Warning: call_user_func_array() expects parameter 1 to be a valid callback, class‘
   Polylang’ does not have a method ‘post_upgrade’ in /home/xxxx/public_html/wp-
   includes/plugin.php on line 173
 * 2 Questions:
 * 1. I read you fixed this issue in the next upgrade, how long till release?
 * 2. After updating Polylang do I have to re-install all plugins?
 * [http://wordpress.org/extend/plugins/polylang/](http://wordpress.org/extend/plugins/polylang/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Chouby](https://wordpress.org/support/users/chouby/)
 * (@chouby)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/post-upgrade-error/#post-3452285)
 * The problem is already corrected in 1.0.1 available for some days. This warning
   should have no influence on how your other plugins were updated.

Viewing 1 replies (of 1 total)

The topic ‘Post Upgrade Error’ is closed to new replies.

 * ![](https://ps.w.org/polylang/assets/icon-256x256.png?rev=3433336)
 * [Polylang](https://wordpress.org/plugins/polylang/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/polylang/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/polylang/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/polylang/unresolved/)
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 * 1 reply
 * 2 participants
 * Last reply from: [Chouby](https://wordpress.org/support/users/chouby/)
 * Last activity: [13 years, 4 months ago](https://wordpress.org/support/topic/post-upgrade-error/#post-3452285)
 * Status: not resolved