Title: Warning: Cannot modify header information
Last modified: September 1, 2016

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# Warning: Cannot modify header information

 *  [kubaspl](https://wordpress.org/support/users/kubaspl/)
 * (@kubaspl)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-175/)
 * dzień dobry
 * po instalacji wtyczki apaczka i jakimkolwiek działaniu pokazuje się komunikat:
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-content/plugins/apaczka/classes/shipping-method.php:1) in /wp-admin/post.
   php on line 197
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-content/plugins/apaczka/classes/shipping-method.php:1) in /wp-includes/
   pluggable.php on line 1167
 * proszę o pomoc w rozwiązaniu problemu

Viewing 1 replies (of 1 total)

 *  [krzysztoflibudzic](https://wordpress.org/support/users/krzysztoflibudzic/)
 * (@krzysztoflibudzic)
 * [9 years, 8 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-175/#post-8163025)
 * Proszę sprawdzić najnowszą wersję wtyczki.

Viewing 1 replies (of 1 total)

The topic ‘Warning: Cannot modify header information’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [krzysztoflibudzic](https://wordpress.org/support/users/krzysztoflibudzic/)
 * Last activity: [9 years, 8 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-175/#post-8163025)
 * Status: not resolved