Fatal error: Uncaught LogicException: Function 'oauth2client_php_autoload' not found (function 'oauth2client_php_autoload' not found or invalid function name) in E:\www\web\wp-content\plugins\wp-mail-smtp\vendor_prefixed\google\auth\autoload.php:35 Stack trace: #0 E:\www\web\wp-content\plugins\wp-mail-smtp\vendor_prefixed\google\auth\autoload.php(35): spl_autoload_register('oauth2client_ph...') #1 {main} thrown in E:\www\web\wp-content\plugins\wp-mail-smtp\vendor_prefixed\google\auth\autoload.php on line 35