Title: admin-ajax.php throws server error 500 when plugin is active
Last modified: August 30, 2016

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# admin-ajax.php throws server error 500 when plugin is active

 *  [farvig](https://wordpress.org/support/users/farvig/)
 * (@farvig)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/admin-ajaxphp-throws-server-error-500-when-plugin-is-active/)
 * First of all thanks for a great plugin – I have used it for years with succes.
 * After the latest update I have an odd bug – WordPress canøt post to admin-ajax.
   php with the plugin activated. If I deactivate admin-ajax.php works just find.
 * This bug causes a lot of the backend to fail I’m sorry to say.
 * Furthermore, this bug isn’t on my local environment. here everything i peachy.
 * Both WP and the plugin is up to date. Any ideas?
 * Thanks.
 * [https://wordpress.org/plugins/wordpress-seo/](https://wordpress.org/plugins/wordpress-seo/)

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 * 0 replies
 * 1 participant
 * Last reply from: [farvig](https://wordpress.org/support/users/farvig/)
 * Last activity: [10 years, 10 months ago](https://wordpress.org/support/topic/admin-ajaxphp-throws-server-error-500-when-plugin-is-active/)
 * Status: not resolved