Fatal error: Uncaught Error: Class 'WPMailSMTP\Vendor\League\OAuth2\Client\OptionProvider\PostAuthOptionProvider' not found in /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/league/oauth2-client/src/OptionProvider/HttpBasicAuthOptionProvider.php:22 Stack trace: #0 {main} thrown in /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/league/oauth2-client/src/OptionProvider/HttpBasicAuthOptionProvider.php on line 22