Title: can’t activate plugin
Last modified: May 15, 2020

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# can’t activate plugin

 *  Resolved [gezonderelatiemeteten](https://wordpress.org/support/users/gezonderelatiemeteten/)
 * (@gezonderelatiemeteten)
 * [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/)
 * Hi,
 * I had found your plugin. I can install it with ‘new plugin’ in WordPress but 
   I can’t activate it…I then get the error message “The plugin has no valid ‘header’“

Viewing 7 replies - 1 through 7 (of 7 total)

 *  Plugin Author [Shane Bishop](https://wordpress.org/support/users/nosilver4u/)
 * (@nosilver4u)
 * [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/#post-12840745)
 * Did you install it directly from the main plugin repo? I would try deleting it
   and reinstalling, as we’ve never seen that sort of error before (and it definitely
   has a plugin header, or it couldn’t be on the plugin repository).
 *  Thread Starter [gezonderelatiemeteten](https://wordpress.org/support/users/gezonderelatiemeteten/)
 * (@gezonderelatiemeteten)
 * [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/#post-12841017)
 * Hi, I had installed it using ‘new plugin’ in the dashboard of WordPress.
    I also
   tried to download the plugin from WordPress.org but then I get ‘failed’ on the
   download.
 * I have deleted the plugin in my wordpress dashboard, installed it again but when
   I want to activate it I get the same error message.
 *  Plugin Author [Shane Bishop](https://wordpress.org/support/users/nosilver4u/)
 * (@nosilver4u)
 * [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/#post-12841064)
 * Could be a caching issue with the server/network, I’d ask your webhost, or just
   wait a day and see if the busted cache clears itself. I just tested it myself
   and it worked fine (we’ve had 48k downloads today with no one else reporting 
   problems).
    -  This reply was modified 6 years ago by [Shane Bishop](https://wordpress.org/support/users/nosilver4u/).
 *  [raquelribeiro](https://wordpress.org/support/users/raquelribeiro/)
 * (@raquelribeiro)
 * [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/#post-12871078)
 * Hi, I have the same issue: “The plugin has no valid ‘header’“. I’ve installed
   it twice and I get the same error message. Any solution?
 *  Plugin Author [Shane Bishop](https://wordpress.org/support/users/nosilver4u/)
 * (@nosilver4u)
 * [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/#post-12871348)
 * I did a bit more searching on the issue, and it seems the most common problem
   is caching, but not quite the sort that I was thinking of. When you install the
   plugin, navigate over to the Plugins list, and try activating from there. If 
   that doesn’t work, flush all caches, **especially database/object caches**, and
   try again.
 * If you’re still stuck, talk to your webhost to see if they can help, but this
   is completely beyond anything we can address from our end.
 *  [raquelribeiro](https://wordpress.org/support/users/raquelribeiro/)
 * (@raquelribeiro)
 * [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/#post-12871396)
 * Fixed. It worked when I activated it from Plugins list. Thanks!
 *  Plugin Author [Shane Bishop](https://wordpress.org/support/users/nosilver4u/)
 * (@nosilver4u)
 * [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/#post-12871949)
 * Glad that worked, we also found out I accidentally copied the plugin folder inside
   itself during the release process, which doubles the plugin zip file. That’s 
   been sorted, so if anyone hasn’t been able to get the installer working, give
   it another try and it should work fine now!

Viewing 7 replies - 1 through 7 (of 7 total)

The topic ‘can’t activate plugin’ is closed to new replies.

 * ![](https://ps.w.org/ewww-image-optimizer/assets/icon-256x256.png?rev=1582276)
 * [EWWW Image Optimizer](https://wordpress.org/plugins/ewww-image-optimizer/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/ewww-image-optimizer/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/ewww-image-optimizer/)
 * [Active Topics](https://wordpress.org/support/plugin/ewww-image-optimizer/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/ewww-image-optimizer/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/ewww-image-optimizer/reviews/)

 * 7 replies
 * 3 participants
 * Last reply from: [Shane Bishop](https://wordpress.org/support/users/nosilver4u/)
 * Last activity: [6 years ago](https://wordpress.org/support/topic/cant-activate-plugin-101/#post-12871949)
 * Status: resolved