Fatal error: Uncaught Error: Class "craft\db\Migration" not found in /home/leasingm/public_html/public_html/vendor/craftcms/cms/src/migrations/m160829_000000_pending_user_content_cleanup.php:13 Stack trace: #0 {main} thrown in /home/leasingm/public_html/public_html/vendor/craftcms/cms/src/migrations/m160829_000000_pending_user_content_cleanup.php on line 13