Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /home/caistbuw/public_html/database/migrations/2021_02_11_172217_add_indexing_for_multiple_columns.php:7 Stack trace: #0 {main} thrown in /home/caistbuw/public_html/database/migrations/2021_02_11_172217_add_indexing_for_multiple_columns.php on line 7