Title: Headers cannot e modified error Last modified: August 22, 2016 --- # Headers cannot e modified error * Resolved [tpuell](https://wordpress.org/support/users/tpuell/) * (@tpuell) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/) * I get this error: Warning: cannot modify header information – headers already sent in /wp-content/plugins/cleantalk-spam-protect/cleantalk.php on line 438 when I activate the plugin. I tried disabling all other plugins, but the error remains. I tried reinstalling wordpress, deleting and re-installing the plugin. I am at my wits end. My client needs this to safeguard her site from spam, but we cannot have these error messages all over the site. please help! * [https://wordpress.org/plugins/cleantalk-spam-protect/](https://wordpress.org/plugins/cleantalk-spam-protect/) Viewing 11 replies - 1 through 11 (of 11 total) * Plugin Support [Aleksandrrazor](https://wordpress.org/support/users/aleksandrrazor/) * (@aleksandrrazor) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574682) * let me know of your website url * Thread Starter [tpuell](https://wordpress.org/support/users/tpuell/) * (@tpuell) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574707) * [http://viequesrainbowrealty.com](http://viequesrainbowrealty.com) but you wont see the problem now. i turned cleantalk off. * Plugin Support [Aleksandrrazor](https://wordpress.org/support/users/aleksandrrazor/) * (@aleksandrrazor) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574715) * One more question, what Theme you are using? * Us take time to check. We will notify you the result or to ask you if we need additional information. * Until then, you can try to install an older version of the plugin 4.5-4.7 * [https://wordpress.org/plugins/cleantalk-spam-protect/developers/](https://wordpress.org/plugins/cleantalk-spam-protect/developers/) * 1. Go to WP Console -> plugins. 2. Deactivate, delete “Anti-spam by CleanTalk”. 3. Go to WP Console -> plugins -> Add new -> Upload. 4. Download, upload and activate, * Does it help? * Plugin Author [Denis Shagy](https://wordpress.org/support/users/shagimuratov/) * (@shagimuratov) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574731) * [@tpuell](https://wordpress.org/support/users/tpuell/), CleanTalk sets cookies at line #438 in cleantalk.php, please look here, * [https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/4.10/cleantalk.php#L438](https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/4.10/cleantalk.php#L438) * But some WordPress plugin sends page data (HTML code, newlines, whitespaces and etc.) before CleanTalk, that’s why you have this warning. * Can you please disable/enable your WP plugins one by one to find the source of issue? If you will find the problem plugin I will test it with CleanTalk and try to do some fix to resolve the issue. * Thread Starter [tpuell](https://wordpress.org/support/users/tpuell/) * (@tpuell) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574772) * [@denis](https://wordpress.org/support/users/denis/) shagy, i did disable all plugins one by one and the error never went away 🙁 @aleksanddrrazor, i am using a custom theme; i will try to work with the older version, thank you * Thread Starter [tpuell](https://wordpress.org/support/users/tpuell/) * (@tpuell) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574780) * i tried rolling it back down to version 4.0. error remains. i am reasonably sure that it used to work with a version later than that, albeit with a different version of wordpress. think the problem must be in the theme or actual wp, but cannot find anything. looked for white spaces everywhere. * Plugin Author [Denis Shagy](https://wordpress.org/support/users/shagimuratov/) * (@shagimuratov) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574792) * [@tpuell](https://wordpress.org/support/users/tpuell/), can you please switch theme to see will the warning appear or not? * Thread Starter [tpuell](https://wordpress.org/support/users/tpuell/) * (@tpuell) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574802) * [@denis](https://wordpress.org/support/users/denis/) shagy when i switch theme warning disappears but on some pages get the same error except this time not in cleantalk but in pluggable.php * Plugin Author [Denis Shagy](https://wordpress.org/support/users/shagimuratov/) * (@shagimuratov) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574810) * Thank you for keeping me updated! * So, it is doesn’t plugin issue. May be the new theme is too old? Please look here, * [https://www.google.com/search?client=safari&rls=en&q=pluggable.php&ie=UTF-8&oe=UTF-8#q=pluggable.php+Warning:+cannot+modify+header+information+-+headers+already+sent&rls=en&tbs=qdr:m](https://www.google.com/search?client=safari&rls=en&q=pluggable.php&ie=UTF-8&oe=UTF-8#q=pluggable.php+Warning:+cannot+modify+header+information+-+headers+already+sent&rls=en&tbs=qdr:m) * Other WordPress users have same issue. * Thread Starter [tpuell](https://wordpress.org/support/users/tpuell/) * (@tpuell) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574816) * [@denis](https://wordpress.org/support/users/denis/) Shagy Thank you for your help * Plugin Author [Denis Shagy](https://wordpress.org/support/users/shagimuratov/) * (@shagimuratov) * [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574819) * you are welcome! Viewing 11 replies - 1 through 11 (of 11 total) The topic ‘Headers cannot e modified error’ is closed to new replies. * ![](https://ps.w.org/cleantalk-spam-protect/assets/icon-256x256.gif?rev=3539767) * [Anti Spam for Contact Forms, Comments & Online Stores - CleanTalk](https://wordpress.org/plugins/cleantalk-spam-protect/) * [Frequently Asked Questions](https://wordpress.org/plugins/cleantalk-spam-protect/#faq) * [Support Threads](https://wordpress.org/support/plugin/cleantalk-spam-protect/) * [Active Topics](https://wordpress.org/support/plugin/cleantalk-spam-protect/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/cleantalk-spam-protect/unresolved/) * [Reviews](https://wordpress.org/support/plugin/cleantalk-spam-protect/reviews/) ## Tags * [error message](https://wordpress.org/support/topic-tag/error-message/) * [headers already sent](https://wordpress.org/support/topic-tag/headers-already-sent/) * 11 replies * 3 participants * Last reply from: [Denis Shagy](https://wordpress.org/support/users/shagimuratov/) * Last activity: [11 years, 5 months ago](https://wordpress.org/support/topic/headers-cannot-e-modified-error/#post-5574819) * Status: resolved