Title: Plugin cant activate
Last modified: January 12, 2023

---

# Plugin cant activate

 *  [romualdv](https://wordpress.org/support/users/romualdv/)
 * (@romualdv)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/plugin-cant-activate-3/)
 * I get the following error when trying to activate the plugin:
 * Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback)
   must be a valid callback, non-static method WAC_Authority_Checker::wac_wpa_install()
   cannot be called statically in /usr/www/users/pragmckbst/wp-includes/class-wp-
   hook.php:307 Stack trace: #0 /usr/www/users/pragmckbst/wp-includes/class-wp-hook.
   php(331): WP_Hook->apply_filters(”, Array) #1 /usr/www/users/pragmckbst/wp-includes/
   plugin.php(476): WP_Hook->do_action(Array) #2 /usr/www/users/pragmckbst/wp-admin/
   plugins.php(194): do_action(‘activate_websit…’) #3 {main} thrown in /usr/www/
   users/pragmckbst/wp-includes/class-wp-hook.php on line 307

The topic ‘Plugin cant activate’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/website-authority-checker_b0def0.
   svg)
 * [Website Authority Checker](https://wordpress.org/plugins/website-authority-checker/)
 * [Support Threads](https://wordpress.org/support/plugin/website-authority-checker/)
 * [Active Topics](https://wordpress.org/support/plugin/website-authority-checker/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/website-authority-checker/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/website-authority-checker/reviews/)

 * 0 replies
 * 1 participant
 * Last reply from: [romualdv](https://wordpress.org/support/users/romualdv/)
 * Last activity: [3 years, 2 months ago](https://wordpress.org/support/topic/plugin-cant-activate-3/)
 * Status: not resolved