Fatal error: Uncaught Error: Class "craft\db\Migration" not found in /home/leasingm/public_html/public_html/vendor/craftcms/cms/src/migrations/m190218_143000_element_index_settings_uid.php:18 Stack trace: #0 {main} thrown in /home/leasingm/public_html/public_html/vendor/craftcms/cms/src/migrations/m190218_143000_element_index_settings_uid.php on line 18