Fatal error: Uncaught Error: Class 'craft\db\Migration' not found in /home/luxurytr/public_html/lt8/vendor/craftcms/cms/src/migrations/m160804_110002_userphotos_to_assets.php:21 Stack trace: #0 {main} thrown in /home/luxurytr/public_html/lt8/vendor/craftcms/cms/src/migrations/m160804_110002_userphotos_to_assets.php on line 21