Title: [Plugin: MailChimp Widget] Warning: Cannot modify header information
Last modified: August 20, 2016

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# [Plugin: MailChimp Widget] Warning: Cannot modify header information

 *  Resolved [stl99](https://wordpress.org/support/users/stl99/)
 * (@stl99)
 * [14 years, 9 months ago](https://wordpress.org/support/topic/plugin-mailchimp-widget-warning-cannot-modify-header-information/)
 * Hi,
 * I sometimes get the error message
 * **_Warning: Cannot modify header information – headers already sent by (output
   started at /www/htdocs/…./wp-content/plugins/mailchimp-widget/lib/ns\_widget\
   _mailchimp.class.php:375) in /www/htdocs/…/wp-login.php on line 353_**
 * when I login or log out in/from my WordPress admin area – any idea what this 
   is about?
 * (I have to load the admin url again and sometimes to deactivate the plugin via
   ftp to get back into my sites admin dashboard, the live website works fine though)
 * [http://wordpress.org/extend/plugins/mailchimp-widget/](http://wordpress.org/extend/plugins/mailchimp-widget/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [jameslafferty](https://wordpress.org/support/users/jameslafferty/)
 * (@jameslafferty)
 * [14 years, 9 months ago](https://wordpress.org/support/topic/plugin-mailchimp-widget-warning-cannot-modify-header-information/#post-2261622)
 * Hi stl99,
 * That doesn’t sound good, mainly because there is no line 375 in ns_widget_mailchimp.
   class.php. Could you ping me at james at nearlysensicaldotcom so we can look 
   into this some more?
 * Cheers,
 * J.
 *  Thread Starter [stl99](https://wordpress.org/support/users/stl99/)
 * (@stl99)
 * [14 years, 9 months ago](https://wordpress.org/support/topic/plugin-mailchimp-widget-warning-cannot-modify-header-information/#post-2261707)
 * James,
 * It was completely my fault as I had accidently produced whitespace after the 
   closing “?>”. I removed it and everything works fine again!
 * Sry for the false alarm…!
 * (BTW – I have already added some html code between the title and the form as 
   you described it in a previous post here in the support forum. Could you please
   help me with doing this after the submit button too?)
 * Thanks again for your quick reply and support!
 * Thomas

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘[Plugin: MailChimp Widget] Warning: Cannot modify header information’
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 * ![](https://s.w.org/plugins/geopattern-icon/mailchimp-widget.svg)
 * [MailChimp Widget](https://wordpress.org/plugins/mailchimp-widget/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/mailchimp-widget/unresolved/)
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 * 2 replies
 * 2 participants
 * Last reply from: [stl99](https://wordpress.org/support/users/stl99/)
 * Last activity: [14 years, 9 months ago](https://wordpress.org/support/topic/plugin-mailchimp-widget-warning-cannot-modify-header-information/#post-2261707)
 * Status: resolved