Edit file File name : autoload_psr4.php Content :<?php // autoload_psr4.php @generated by Composer $vendorDir = dirname(dirname(__FILE__)); $baseDir = dirname($vendorDir); return array( 'WPForms\\Tests\\Unit\\' => array($baseDir . '/tests/unit'), 'WPForms\\Tests\\Integration\\' => array($baseDir . '/tests/integration'), 'WPForms\\Scoper\\' => array($baseDir . '/../.php-scoper'), 'WPForms\\' => array($baseDir . '/src', $baseDir . '/src'), 'Symfony\\Polyfill\\Mbstring\\' => array($vendorDir . '/symfony/polyfill-mbstring'), 'Symfony\\Polyfill\\Iconv\\' => array($vendorDir . '/symfony/polyfill-iconv'), ); Save