Title: woo commerce activation error
Last modified: April 20, 2020

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# woo commerce activation error

 *  Resolved [sundaymasterclass](https://wordpress.org/support/users/sundaymasterclass/)
 * (@sundaymasterclass)
 * [6 years, 2 months ago](https://wordpress.org/support/topic/woo-commerce-activation-error/)
 * Hi,
 * Im implementing Woo Commerce to a website. I have performed a back up and updated
   the php from 5.1 to 7.1 and now Im receiving the following warnings, please can
   you advise how to fix so I can activate woo commerce?
 * Warning: include_once(/home4/devinestudio/public_html/wp-content/plugins/hummingbird-
   performance/core/class-utils.php): failed to open stream: No such file or directory
   in /home4/devinestudio/public_html/wp-content/advanced-cache.php on line 23
 * Warning: include_once(): Failed opening ‘/home4/devinestudio/public_html/wp-content/
   plugins/hummingbird-performance/core/class-utils.php’ for inclusion (include_path
   =’.:/opt/php71/lib/php’) in /home4/devinestudio/public_html/wp-content/advanced-
   cache.php on line 23
 * Warning: include_once(/home4/devinestudio/public_html/wp-content/plugins/hummingbird-
   performance/core/class-abstract-module.php): failed to open stream: No such file
   or directory in /home4/devinestudio/public_html/wp-content/advanced-cache.php
   on line 24
 * Warning: include_once(): Failed opening ‘/home4/devinestudio/public_html/wp-content/
   plugins/hummingbird-performance/core/class-abstract-module.php’ for inclusion(
   include_path=’.:/opt/php71/lib/php’) in /home4/devinestudio/public_html/wp-content/
   advanced-cache.php on line 24
 * Warning: include_once(/home4/devinestudio/public_html/wp-content/plugins/hummingbird-
   performance/core/modules/class-module-page-cache.php): failed to open stream:
   No such file or directory in /home4/devinestudio/public_html/wp-content/advanced-
   cache.php on line 25
 * Warning: include_once(): Failed opening ‘/home4/devinestudio/public_html/wp-content/
   plugins/hummingbird-performance/core/modules/class-module-page-cache.php’ for
   inclusion (include_path=’.:/opt/php71/lib/php’) in /home4/devinestudio/public_html/
   wp-content/advanced-cache.php on line 25
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home4/devinestudio/public_html/wp-content/advanced-cache.php:23) in /home4/
   devinestudio/public_html/wp-includes/functions.php on line 6221
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home4/devinestudio/public_html/wp-content/advanced-cache.php:23) in /home4/
   devinestudio/public_html/wp-admin/includes/misc.php on line 1259
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home4/devinestudio/public_html/wp-content/advanced-cache.php:23) in /home4/
   devinestudio/public_html/wp-includes/pluggable.php on line 1281
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home4/devinestudio/public_html/wp-content/advanced-cache.php:23) in /home4/
   devinestudio/public_html/wp-includes/pluggable.php on line 1284

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

 *  Plugin Support [wpnomad a11n](https://wordpress.org/support/users/wpnomad/)
 * (@wpnomad)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/woo-commerce-activation-error/#post-12708148)
 * Hi [@sundaymasterclass](https://wordpress.org/support/users/sundaymasterclass/),
 * The warning notices you’re seeing are coming from the following plugins:
 * 1. Hummingbird Performance
    2. Advanced Cache
 * I recommend reaching out to the support of these plugins so they can further 
   check and help you find out why these warnings are being displayed.
 *  [Joey – a11n](https://wordpress.org/support/users/jricketts4/)
 * (@jricketts4)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/woo-commerce-activation-error/#post-12769643)
 * We haven’t heard back from you in a while, so I’m going to mark this as resolved–
   if you have any further questions, you can start a new thread.
 * – Joey

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

The topic ‘woo commerce activation error’ is closed to new replies.

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## Tags

 * [public_html](https://wordpress.org/support/topic-tag/public_html/)

 * 2 replies
 * 3 participants
 * Last reply from: [Joey – a11n](https://wordpress.org/support/users/jricketts4/)
 * Last activity: [6 years, 1 month ago](https://wordpress.org/support/topic/woo-commerce-activation-error/#post-12769643)
 * Status: resolved