Title: Plugin Does Not Have A Valid Header ERROR
Last modified: August 22, 2016

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# Plugin Does Not Have A Valid Header ERROR

 *  [Cygnus X-1](https://wordpress.org/support/users/cygnus-x-1/)
 * (@cygnus-x-1)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/plugin-does-not-have-a-valid-header-error/)
 * Hello,
    I’ve been unable to install MailChimp Add On for Paid Memberships Pro.
 * I install the plugin from the WordPress depository, but when I go to activate
   it, I get the “Plugin does not have a valid header” message. I’ve tried installing
   from cPanel as well by uploading the plugin and then Activating from WordPress,
   but when I activate I just get a blank screen and I have to delete the plugin
   from cPanel so I can log in again to the site.
 * I’ve searched for solutions to this error. Most provide solutions based on the
   plugin being zipped inside another zipped folder, but this is not the case with
   this plugin.
 * Any ideas on how to fix?
 * Thanks!
 * [https://wordpress.org/plugins/pmpro-mailchimp/](https://wordpress.org/plugins/pmpro-mailchimp/)

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

 *  Thread Starter [Cygnus X-1](https://wordpress.org/support/users/cygnus-x-1/)
 * (@cygnus-x-1)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/plugin-does-not-have-a-valid-header-error/#post-5581587)
 * Just an update to this, I’ve had some success activating this plugin on other
   sites. And reading a couple of other forum posts, could be related to my install
   of W3 Total Cache but I’m still trying to resolve.
 *  [bigmikestudios](https://wordpress.org/support/users/bigmikestudios/)
 * (@bigmikestudios)
 * [11 years, 2 months ago](https://wordpress.org/support/topic/plugin-does-not-have-a-valid-header-error/#post-5581886)
 * I’m finding the same thing. I’ve done it on a fresh wordpress install, I’m just
   testing PMPro to see if it will serve my needs. It’s installed and being served
   up on my local machine, if that’s a clue…
 *  [bigmikestudios](https://wordpress.org/support/users/bigmikestudios/)
 * (@bigmikestudios)
 * [11 years, 2 months ago](https://wordpress.org/support/topic/plugin-does-not-have-a-valid-header-error/#post-5581887)
 * Just solved this for myself, I had a copy of the zip next to the folder in my
   plugins directory – this was throwing it for a loop. Read here for more detail:
   [https://wordpress.org/support/topic/the-plugin-does-not-have-a-valid-header-1?replies=9](https://wordpress.org/support/topic/the-plugin-does-not-have-a-valid-header-1?replies=9)

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

The topic ‘Plugin Does Not Have A Valid Header ERROR’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/pmpro-mailchimp_927014.svg)
 * [Paid Memberships Pro - Mailchimp Add On](https://wordpress.org/plugins/pmpro-mailchimp/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/pmpro-mailchimp/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/pmpro-mailchimp/)
 * [Active Topics](https://wordpress.org/support/plugin/pmpro-mailchimp/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/pmpro-mailchimp/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/pmpro-mailchimp/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [bigmikestudios](https://wordpress.org/support/users/bigmikestudios/)
 * Last activity: [11 years, 2 months ago](https://wordpress.org/support/topic/plugin-does-not-have-a-valid-header-error/#post-5581887)
 * Status: not resolved