Fatal error: Uncaught Error: Class 'WPMailSMTP\MigrationAbstract' not found in /home/clmepl5/public_html/web/app/plugins/wp-mail-smtp/src/Migration.php:17 Stack trace: #0 {main} thrown in /home/clmepl5/public_html/web/app/plugins/wp-mail-smtp/src/Migration.php on line 17