Title: Error when installed
Last modified: March 13, 2017

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# Error when installed

 *  [elsmedia](https://wordpress.org/support/users/elsmedia/)
 * (@elsmedia)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/error-when-installed-2/)
 * We’ve just upgraded our store and every time we try to add a product to the cart
   we receive the following issue.
 * `Warning: Cannot modify header information - headers already sent by (output 
   started at [serverpath]/wp-content/plugins/mwp-herd-effect/admin/admin.php:25)
   in [serverpath]/wp-includes/pluggable.php on line 1179`
 * Any advice?

Viewing 1 replies (of 1 total)

 *  Plugin Author [Wow-Company](https://wordpress.org/support/users/wpcalc/)
 * (@wpcalc)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/error-when-installed-2/#post-8910886)
 * Please, update to version 2.3

Viewing 1 replies (of 1 total)

The topic ‘Error when installed’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [Wow-Company](https://wordpress.org/support/users/wpcalc/)
 * Last activity: [9 years, 2 months ago](https://wordpress.org/support/topic/error-when-installed-2/#post-8910886)
 * Status: not resolved