wpsnoop Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0()

If you are dealing with a WordPress issue where a PHP Function action_scheduler_initialize_3_dot_3_dot_0() was already declared it is most likely due to a plugin/theme conflict.

wpsnoop scanned and analyzed over 100,000 WordPress plugins and themes to find and locate potential conflicts including functions that share the same name.

This page has information on the 11 places where that function is declared and used in WordPress plugins and themes.

Note: Our database currently only taps into the free themes and plugins available in the publicly available WordPress plugins and themes, if your site uses paid plugins, themes or custom code there may be additional conflicts.


Our database has uncovered 11 different instances of potential conflicts where different plugins or themes share the function name.

Examples of this error include:

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/email-subscribers/lite/includes/libraries/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin Email Subscribers & Newsletters and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/wp-health/thirds/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin WP Umbrella and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/defender-security/vendor/woocommerce/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin Defender and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/wp-marketing-automations/libraries/action-scheduler/action-scheduler.php:23)

This file is part of the WordPress plugin Autonami Marketing Automations For WordPress and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/widget-for-eventbrite-api/includes/vendor/woocommerce/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin Display Eventbrite Events and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/podcast-importer-secondline/lib/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin Podcast Importer SecondLine and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/smart-image-resize/libraries/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin Smart Image Resize for WooCommerce and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/how-many-posts/src/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin How Many Posts? and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/auto-youtube-importer/lib/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin Auto YouTube Importer and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/cartflows/libraries/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin CartFlows and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare action_scheduler_initialize_3_dot_3_dot_0() (previously declared in wp-content/plugins/email-notifications-for-wp-ulike/vendor/woocommerce/action-scheduler/action-scheduler.php:49)

This file is part of the WordPress plugin Email Notifications For WP ULike and could be interacting with another theme or plugin and causing a fatal error.

The error occurs because two (or more) plugins that you are using are both trying to declare a function with the same name.