Title: Error on plugin activation
Last modified: August 21, 2016

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# Error on plugin activation

 *  [Viorel-Cosmin Miron](https://wordpress.org/support/users/siravecavec/)
 * (@siravecavec)
 * [12 years ago](https://wordpress.org/support/topic/error-on-plugin-activation-4/)
 * When I try to activate the plugin from [http://ioanaboutique.ro/wp-admin/plugins.php?action=activate&plugin&_wpnonce=de3584273fi](http://ioanaboutique.ro/wp-admin/plugins.php?action=activate&plugin&_wpnonce=de3584273fi)
   Receive error about invalid headers
    Like this in RO language: Modulul nu conține
   un antet valid. EN The Plugin does not have a valid antet.
 * Any workaround this?
 * [https://wordpress.org/plugins/mailchimp/](https://wordpress.org/plugins/mailchimp/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [mc_dominic](https://wordpress.org/support/users/mc_dominic/)
 * (@mc_dominic)
 * [12 years ago](https://wordpress.org/support/topic/error-on-plugin-activation-4/#post-4912074)
 * Hi Siravecavec,
 * Thanks for hopping in the forum. Do you mind walking us through how you’re installing
   the plugin? Are you installing it from the plugins page or uploading the plugin
   zip file? Also include the version of wordpress and the plugin you’re using.
 * We look forward to hearing from you!
 * -mc_d
 *  Thread Starter [Viorel-Cosmin Miron](https://wordpress.org/support/users/siravecavec/)
 * (@siravecavec)
 * [12 years ago](https://wordpress.org/support/topic/error-on-plugin-activation-4/#post-4912081)
 * Yes I was going to Plugin menu, Add new, Searched the plugin in the search box,
   and then simply click Install button. After I received the error, when the plugin
   was successfully installed but I was not able to Complete the Activation, while
   the header error showed up. I am using latest stable wordpress 3.9.1.
 *  [mc_dominic](https://wordpress.org/support/users/mc_dominic/)
 * (@mc_dominic)
 * [12 years ago](https://wordpress.org/support/topic/error-on-plugin-activation-4/#post-4912112)
 * Hi Siravecavec,
 * Just to clarify, are you seeing this error when clicking Activate button from
   the plugins page? Also can you confirm the version of the plugin you’re using?
   A screenshot of the plugins page and the error would also help.
 * And can you try to installing the plugin from zip file downloaded from the plugin
   page: [http://wordpress.org/support/plugin/mailchimp](http://wordpress.org/support/plugin/mailchimp)
   If you’re seeing the same error with the zip file let us know.
 * Thanks!

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Error on plugin activation’ is closed to new replies.

 * ![](https://ps.w.org/mailchimp/assets/icon.svg?rev=3156997)
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 * 3 replies
 * 2 participants
 * Last reply from: [mc_dominic](https://wordpress.org/support/users/mc_dominic/)
 * Last activity: [12 years ago](https://wordpress.org/support/topic/error-on-plugin-activation-4/#post-4912112)
 * Status: not resolved