Title: Error activating plugin
Last modified: July 19, 2023

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# Error activating plugin

 *  Resolved [ukndoit](https://wordpress.org/support/users/ukndoit/)
 * (@ukndoit)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/error-activating-plugin-52/)
 * When I activated Checkout Field Editor Pro version 3.5.0 I get this fatal error:
 * **Fatal error**: Uncaught Error: Call to a member function get() on null in /
   home/{userhidden}/public_html/wp-content/plugins/booked/includes/add-ons/woocommerce-
   payments/lib/woocommerce/class-wc-cart.php:152 Stack trace: #0 /home/{userhidden}/
   public_html/wp-includes/class-wp-hook.php(308): Booked_WC_Cart_Hooks::woocommerce_checkout_fields(
   Array) #1 /home/{userhidden}/public_html/wp-includes/plugin.php(205): WP_Hook-
   >apply_filters(Array, Array) #2 /home/{userhidden}/public_html/wp-content/plugins/
   woocommerce-checkout-field-editor-pro/admin/class-thwcfe-admin-utils.php(432):
   apply_filters(‘woocommerce_che…’, Array) #3 /home/{userhidden}/public_html/wp-
   content/plugins/woocommerce-checkout-field-editor-pro/admin/class-thwcfe-admin-
   utils.php(218): THWCFE_Admin_Utils->get_default_checkout_fields(”, false) #4 /
   home/{userhidden}/public_html/wp-content/plugins/woocommerce-checkout-field-editor-
   pro/admin/class-thwcfe-admin-utils.php(134): THWCFE_Admin_Utils->get_default_sections(
   false) #5 /home/{userhidden}/public_html/wp-content/plugins/woocommerce-checkout-
   field-editor-pro/includes/class-thwcfe-activator.php(83): THWCFE_Admin_Utils-
   >prepare_sections_and_fields() #6 /home/{userhidden}/public_html/wp-content/plugins/
   woocommerce-checkout-field-editor-pro/includes/class-thwcfe-activator.php(54):
   THWCFE_Activator::may_copy_free_version_settings() #7 /home/{userhidden}/public_html/
   wp-content/plugins/woocommerce-checkout-field-editor-pro/includes/class-thwcfe-
   activator.php(29): THWCFE_Activator::check_for_premium_settings(”) #8 /home/{
   userhidden}/public_html/wp-content/plugins/woocommerce-checkout-field-editor-
   pro/woocommerce-checkout-field-editor-pro.php(50): THWCFE_Activator::activate(”)#
   9 /home/{userhidden}/public_html/wp-includes/class-wp-hook.php(308): activate_thwcfe(”)#
   10 /home/{userhidden}/public_html/wp-includes/class-wp-hook.php(332): WP_Hook-
   >apply_filters(”, Array) #11 /home/{userhidden}/public_html/wp-includes/plugin.
   php(517): WP_Hook->do_action(Array) #12 /home/{userhidden}/public_html/wp-admin/
   plugins.php(194): do_action(‘activate_woocom…’) #13 {main} thrown in **/home/{
   userhidden}/public_html/wp-content/plugins/booked/includes/add-ons/woocommerce-
   payments/lib/woocommerce/class-wc-cart.php** on line **152**
 * Any ideas on how to fix this fatal error?
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-activating-plugin-52%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

 *  Thread Starter [ukndoit](https://wordpress.org/support/users/ukndoit/)
 * (@ukndoit)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/error-activating-plugin-52/#post-16907113)
 * I noticed another plugin name in the fatal error, I disabled it, then activated
   this one, and it worked, then activated the other one again and it worked. So
   I guess I could not activate this while that one was active. but they are both
   active now and working.
 *  Plugin Author [ThemeHigh](https://wordpress.org/support/users/themehigh/)
 * (@themehigh)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/error-activating-plugin-52/#post-16908234)
 * Hi,
 * We are glad to know that your concern has been resolved.
 * Please do let us know if you have any other queries.
   ​Thank you!

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

The topic ‘Error activating plugin’ is closed to new replies.

 * ![](https://ps.w.org/woo-checkout-field-editor-pro/assets/icon-256x256.gif?rev
   =3479964)
 * [Checkout Field Editor (Checkout Manager) for WooCommerce](https://wordpress.org/plugins/woo-checkout-field-editor-pro/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woo-checkout-field-editor-pro/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woo-checkout-field-editor-pro/)
 * [Active Topics](https://wordpress.org/support/plugin/woo-checkout-field-editor-pro/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woo-checkout-field-editor-pro/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woo-checkout-field-editor-pro/reviews/)

## Tags

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

 * 2 replies
 * 2 participants
 * Last reply from: [ThemeHigh](https://wordpress.org/support/users/themehigh/)
 * Last activity: [2 years, 10 months ago](https://wordpress.org/support/topic/error-activating-plugin-52/#post-16908234)
 * Status: resolved