Fatal error: Uncaught Error: Class 'WC_Integration' not found in /wp-content/plugins/woocommerce-wfirma/src/WoocommerceIntegration.php:23 Stack trace: #0 /wp-content/plugins/flexible-shipping/vendor/composer/ClassLoader.php(444): include() #1 /wp-content/plugins/flexible-shipping/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/wp-content/plu...') #2 [internal function]: Composer\Autoload\ClassLoader->loadClass('WPDesk\\WooComme...') #3 /wp-content/plugins/woocommerce-wfirma/src/Plugin.php(83): spl_autoload_call('WPDesk\\WooComme...') #4 /wp-content/plugins/woocommerce-wfirma/vendor_prefixed/wpdesk/wp-plugin-flow/src/Initialization/BuilderTrait.php(66): WPDesk\WooCommerceWFirma\Plugin->init() #5 /wp-content/plugins/woocommerce-wfirma/vendor_prefixed/wpdesk/wp-plugin-flow/src/Initialization/Simple/SimplePaidStrategy.php(66): WFirmaVendor\WPDesk\Plugin\Flow\Initialization\Simple\SimplePaidStrategy->init_plugin(Object(WPDesk\WooCommerceWFirma\Plugin)) #6 /wp-includes/class-wp-hook.php(307): WFirmaVendor\ in /wp-content/plugins/woocommerce-wfirma/src/WoocommerceIntegration.php on line 23