Fatal error: Uncaught Error: Class "yii\db\Migration" not found in /users/quirl/www/filemanager/spark/protected/runtime/module_backups/content-bookmarks_1735853573/migrations/m210303_111425_initial.php:8 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/runtime/module_backups/content-bookmarks_1735853573/migrations/m210303_111425_initial.php on line 8