Title: Plugin produces header errors
Last modified: September 4, 2020

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# Plugin produces header errors

 *  Resolved [atjn](https://wordpress.org/support/users/atjn/)
 * (@atjn)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/plugin-produces-header-errors/)
 * Hi 🙂
 * After installing this plugin on two completely separate websites (both running
   WordPress 5.5.1), i get the following text on all admin pages:
 *     ```
       Warning: Cannot modify header information - headers already sent by (output started at /[REDACTED]/wp-content/plugins/mtcaptcha/mt-captcha.php:323) in /[REDACTED]/wp-includes/functions.php on line 6270
   
       Warning: Cannot modify header information - headers already sent by (output started at /[REDACTED]/wp-content/plugins/mtcaptcha/mt-captcha.php:323) in /[REDACTED]/wp-admin/includes/misc.php on line 1310
   
       Warning: Cannot modify header information - headers already sent by (output started at /[REDACTED]/wp-content/plugins/mtcaptcha/mt-captcha.php:323) in /[REDACTED]/wp-admin/admin-header.php on line 9
       ```
   
 * It seems to me that this is a universal error. If you cannot reproduce it, i 
   will provide more details about the installs. Thanks!

Viewing 1 replies (of 1 total)

 *  Thread Starter [atjn](https://wordpress.org/support/users/atjn/)
 * (@atjn)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/plugin-produces-header-errors/#post-13363502)
 * Update: There are also other issues. Sometimes my admin page just goes blank,
   and i am constantly receiving novel errors when trying to save settings or install
   new plugins. All issues are resolved as soon as i disable MTCaptcha WordPress
   Plugin, and come back as soon as i re-enable it.

Viewing 1 replies (of 1 total)

The topic ‘Plugin produces header errors’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/mtcaptcha.svg)
 * [MTCaptcha WordPress Plugin](https://wordpress.org/plugins/mtcaptcha/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/mtcaptcha/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/mtcaptcha/)
 * [Active Topics](https://wordpress.org/support/plugin/mtcaptcha/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/mtcaptcha/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/mtcaptcha/reviews/)

 * 1 reply
 * 1 participant
 * Last reply from: [atjn](https://wordpress.org/support/users/atjn/)
 * Last activity: [5 years, 9 months ago](https://wordpress.org/support/topic/plugin-produces-header-errors/#post-13363502)
 * Status: resolved