Cannot modify header information

  • 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

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  • Moderator James Huff

    (@macmanx)

    Access your server via SFTP or FTP, or a file manager in your hosting account’s control panel (consult your hosting provider’s documentation for specifics on these), navigate to /wp-content/plugins/ and delete the whole /hummingbird-performance/ directory.

    This will remove the plugin causing the problem and restore your site.

    Next, I recommend reporting the issue at https://www.ads-software.com/support/plugin/hummingbird-performance/ so the plugin’s developers and support community can help you with this.

Viewing 1 replies (of 1 total)
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