Title: Critical error
Last modified: April 2, 2021

---

# Critical error

 *  Resolved [karkiat](https://wordpress.org/support/users/karkiat/)
 * (@karkiat)
 * [5 years, 1 month ago](https://wordpress.org/support/topic/critical-error-179/)
 * Hi! Need some help. I just started my wordpress site and tried installing woocommerce
   but received the following message. Not sure what i can do. Spoke to hostinger,
   my webhost but they are not able to help and referred me here.
 *     ```
       Fatal error: Uncaught Error: Class 'WC_Data' not found in /home/u495158269/domains/j-claire.com/public_html/wp-content/plugins/woocommerce/packages/woocommerce-admin/src/Notes/Note.php:15 Stack trace: #0 /home/u495158269/domains/j-claire.com/public_html/wp-content/plugins/jetpack/vendor/jetpack-autoloader/class-php-autoloader.php(87): require() #1 [internal function]: Automattic\Jetpack\Autoloader\jpf11009ded9fc4592b6a05b61ce272b3cjetpack\PHP_Autoloader::load_class('Automattic\\WooC...') #2 [internal function]: spl_autoload_call('Automattic\\WooC...') #3 /home/u495158269/domains/j-claire.com/public_html/wp-content/plugins/optinmonster/OMAPI/WooCommerce.php(542): class_exists('Automattic\\WooC...') #4 /home/u495158269/domains/j-claire.com/public_html/wp-includes/class-wp-hook.php(292): OMAPI_WooCommerce->maybe_store_note('') #5 /home/u495158269/domains/j-claire.com/public_html/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(NULL, Array) #6 /home/u495158269/domains/j-claire.com/public_html/wp-includes/plugin.php( in /home/u495158269/domains/j-claire.com/public_html/wp-content/plugins/woocommerce/packages/woocommerce-admin/src/Notes/Note.php on line 15
       There has been a critical error on this website. Please check your site admin email inbox for instructions.
   
       Learn more about troubleshooting WordPress.
       ```
   

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## Tags

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

 * 0 replies
 * 1 participant
 * Last reply from: [karkiat](https://wordpress.org/support/users/karkiat/)
 * Last activity: [5 years, 1 month ago](https://wordpress.org/support/topic/critical-error-179/)
 * Status: resolved