Title: major plugin conflicts
Last modified: March 29, 2022

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# major plugin conflicts

 *  Resolved [shawfactor](https://wordpress.org/support/users/shawfactor/)
 * (@shawfactor)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/major-plugin-conflicts/)
 * major conflicts
 * your plugins adds a must use plugin to mu-plugin and am getting many warnings
   eg eg:
 *     ```
       [29-Mar-2022 05:08:34 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/melbour9/public_html/wp-content/mu-plugins/fast-ajax.php:1) in /home/melbour9/public_html/wp-admin/includes/misc.php on line 1310
       [29-Mar-2022 05:08:34 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/melbour9/public_html/wp-content/mu-plugins/fast-ajax.php:1) in /home/melbour9/public_html/wp-admin/includes/misc.php on line 1310
       ```
   
 * and it seems to break admin-ajax in some circumstances
 * Otherwise love the plugin (it works well) but I can’t use it due the plugin conflicts

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

 *  Plugin Author [Bowo](https://wordpress.org/support/users/qriouslad/)
 * (@qriouslad)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/major-plugin-conflicts/#post-15504951)
 * [@shawfactor](https://wordpress.org/support/users/shawfactor/) thanks for reporting.
   Will investigate and get back to you.
 * Can you share under which circumstances it’s breaking admin-ajax? The MU plugin
   was added in v2.0.
 * Also, any info on your set up might help too, e.g. NGINX / Apache, PHP version,
   WP version.
 *  Plugin Author [Bowo](https://wordpress.org/support/users/qriouslad/)
 * (@qriouslad)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/major-plugin-conflicts/#post-15505341)
 * [@shawfactor](https://wordpress.org/support/users/shawfactor/) also, can you 
   deactivate the current version, update to v2.1.1 which I’m pushing out now, and
   activate? I’ve cleaned up the fast-ajax.php file being generated, which hopefully
   will solve the “headers already sent” issue. Otherwise, I’m also open if you 
   have any idea on how to fix this. Thanks!
 *  Thread Starter [shawfactor](https://wordpress.org/support/users/shawfactor/)
 * (@shawfactor)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/major-plugin-conflicts/#post-15505810)
 * Looks good many thanks
 *  Plugin Author [Bowo](https://wordpress.org/support/users/qriouslad/)
 * (@qriouslad)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/major-plugin-conflicts/#post-15505945)
 * [@shawfactor](https://wordpress.org/support/users/shawfactor/) issue resolved
   on your end with v2.1.1?

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

The topic ‘major plugin conflicts’ is closed to new replies.

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 * 4 replies
 * 2 participants
 * Last reply from: [Bowo](https://wordpress.org/support/users/qriouslad/)
 * Last activity: [4 years, 2 months ago](https://wordpress.org/support/topic/major-plugin-conflicts/#post-15505945)
 * Status: resolved