Fatal error: Uncaught Error: Call to undefined function woocommerce_store_api_register_update_callback() in /homepages/21/d402738979/htdocs/WP2019/wp-content/plugins/woocommerce-payments/includes/platform-checkout-user/class-platform-checkout-extension.php:23 Stack trace: #0 /homepages/21/d402738979/htdocs/WP2019/wp-content/plugins/woocommerce-payments/woocommerce-payments.php(332): Platform_Checkout_Extension->register_extend_rest_api_update_callback() #1 /homepages/21/d402738979/htdocs/WP2019/wp-includes/class-wp-hook.php(303): register_platform_checkout_extension('') #2 /homepages/21/d402738979/htdocs/WP2019/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array) #3 /homepages/21/d402738979/htdocs/WP2019/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #4 /homepages/21/d402738979/htdocs/WP2019/wp-content/plugins/woocommerce/packages/woocommerce-blocks/src/Domain/Bootstrap.php(70): do_action('woocommerce_blo...') #5 /homepages/21/d402738979/htdocs/WP2019/wp-content/plugins/woocommerce/packages/wooc in /homepages/21/d402738979/htdocs/WP2019/wp-content/plugins/woocommerce-payments/includes/platform-checkout-user/class-platform-checkout-extension.php on line 23