Fatal error: Uncaught Error: Class 'WPDesk_Flexible_Shipping_Integration_Label_Builder' not found in /wp-content/plugins/woocommerce-paczkomaty-inpost/src/Shipment/LabelBuilder.php:20 Stack trace: #0 /wp-content/plugins/flexible-invoices/vendor/composer/ClassLoader.php(582): include() #1 /wp-content/plugins/flexible-invoices/vendor/composer/ClassLoader.php(433): Composer\Autoload\{closure}('/wp-content/plu...') #2 [internal function]: Composer\Autoload\ClassLoader->loadClass('FS\\InPost\\Shipm...') #3 /wp-content/plugins/woocommerce-paczkomaty-inpost/class/class-paczkomaty-plugin.php(122): spl_autoload_call('FS\\InPost\\Shipm...') #4 /wp-includes/class-wp-hook.php(303): WPDesk_Paczkomaty_Plugin->init_labels_builder('') #5 /wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array) #6 /wp-includes/plugin.php(470): WP_Hook->do_action(Array) #7 /wp-settings.php(441): do_action('plugins_loaded') #8 /wp-config.php(93): require_once('/wp-settings.ph...') #9 /wp-load.php(50): require_once('/wp-config.php') #10 /wp-b in /wp-content/plugins/woocommerce-paczkomaty-inpost/src/Shipment/LabelBuilder.php on line 20