Fatal error: Uncaught Error: Class "craft\db\Migration" not found in /home/leasingm/public_html/public_html/vendor/craftcms/cms/src/migrations/m161125_150752_clear_urlmanager_cache.php:12 Stack trace: #0 {main} thrown in /home/leasingm/public_html/public_html/vendor/craftcms/cms/src/migrations/m161125_150752_clear_urlmanager_cache.php on line 12