Title: All Plugins Deactivated (Invalid Header)
Last modified: August 24, 2016

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# All Plugins Deactivated (Invalid Header)

 *  Resolved [AtcoreSystems](https://wordpress.org/support/users/atcoresystems/)
 * (@atcoresystems)
 * [10 years, 12 months ago](https://wordpress.org/support/topic/all-plugins-deactivated-invalid-header/)
 * I installed a plugin called Twiget 1.1.3. After activating the plugin, all of
   my other plugins immediately deactivated. Each plugin had an error message saying
   that the plugins deactivated due to an invalid header.
 * Is there anyway to restore them?

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [Bill](https://wordpress.org/support/users/chubbycrow/)
 * (@chubbycrow)
 * [10 years, 12 months ago](https://wordpress.org/support/topic/all-plugins-deactivated-invalid-header/#post-6177313)
 * Have you deactivated and deleted the Twiget plugin?
 *  Thread Starter [AtcoreSystems](https://wordpress.org/support/users/atcoresystems/)
 * (@atcoresystems)
 * [10 years, 12 months ago](https://wordpress.org/support/topic/all-plugins-deactivated-invalid-header/#post-6177428)
 * Yeah. I deactivated it and deleted it. We put a backup instance of the site up
   and you can see the plugins like the Slider on the site; however, the plugins
   still don’t appear in the dashboard.
 *  [Bill](https://wordpress.org/support/users/chubbycrow/)
 * (@chubbycrow)
 * [10 years, 12 months ago](https://wordpress.org/support/topic/all-plugins-deactivated-invalid-header/#post-6177465)
 * That’s a weird one. They don’t appear at all? Do they exist in wp-content/plugins
   on the server?
 * If they are where they should be, I would clear your browser cache, rename the
   plugins folder to ‘plugins-hold’, reload the admin Plugins page, and then rename
   the disabled plugins folder back to ‘plugins’. Again reload the admin page to
   see if the plugin list got reset. Not sure what else to suggest on this one.
 *  Thread Starter [AtcoreSystems](https://wordpress.org/support/users/atcoresystems/)
 * (@atcoresystems)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/all-plugins-deactivated-invalid-header/#post-6177515)
 * Yeah, they appeared on the server. One of our technical people found weird code
   in the php files for the plugins, he ran a script to remove the code and they
   reappeared. Now I have to go through the site and reactivate them but at least
   they’re back. Thanks for your suggestions. I think you can label this one closed
   but it’s still a mystery to me how the plugins were deactivated in the first 
   place.
 * Thanks

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘All Plugins Deactivated (Invalid Header)’ is closed to new replies.

## Tags

 * [deactivate](https://wordpress.org/support/topic-tag/deactivate/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 4 replies
 * 2 participants
 * Last reply from: [AtcoreSystems](https://wordpress.org/support/users/atcoresystems/)
 * Last activity: [10 years, 11 months ago](https://wordpress.org/support/topic/all-plugins-deactivated-invalid-header/#post-6177515)
 * Status: resolved

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