Title: Activate Plugin Errors
Last modified: August 21, 2016

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# Activate Plugin Errors

 *  [neopet001](https://wordpress.org/support/users/neopet001/)
 * (@neopet001)
 * [12 years, 1 month ago](https://wordpress.org/support/topic/activate-plugin-errors/)
 * Hi, I installed the plugin without problem. However when activating it shows 
   errors besides “Plugin activated” (… is hidden path):
 * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘
   wpscLanguageInit’ not found or invalid function name in /home/…/public_html/wp-
   includes/plugin.php on line 470
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/…/public_html/wp-includes/plugin.php:470) in /home/…/public_html/wp-
   includes/option.php on line 747
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/…/public_html/wp-includes/plugin.php:470) in /home/…/public_html/wp-
   includes/option.php on line 748
 * I stop doing things with the plugin then, will back when have time.
 * Keep up your good work!
 * [https://wordpress.org/plugins/wpbugtracktor/](https://wordpress.org/plugins/wpbugtracktor/)

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

 *  Plugin Author [jquindlen](https://wordpress.org/support/users/jquindlen/)
 * (@jquindlen)
 * [12 years ago](https://wordpress.org/support/topic/activate-plugin-errors/#post-4878499)
 * Are you running in multisite mode?
 *  Thread Starter [neopet001](https://wordpress.org/support/users/neopet001/)
 * (@neopet001)
 * [12 years ago](https://wordpress.org/support/topic/activate-plugin-errors/#post-4878529)
 * Ah I see, so the problem only occurs with multisite? Is there any workaround 
   then?
    Thanks

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

The topic ‘Activate Plugin Errors’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wpbugtracktor_e6e8ed.svg)
 * [IDB Bug Tracker](https://wordpress.org/plugins/wpbugtracktor/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wpbugtracktor/#faq)
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 * [Active Topics](https://wordpress.org/support/plugin/wpbugtracktor/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wpbugtracktor/unresolved/)
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 * 2 replies
 * 2 participants
 * Last reply from: [neopet001](https://wordpress.org/support/users/neopet001/)
 * Last activity: [12 years ago](https://wordpress.org/support/topic/activate-plugin-errors/#post-4878529)
 * Status: not resolved