Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in C:\xampp\htdocs\database\migrations\2018_05_22_224911_alter_private_messages_table.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\database\migrations\2018_05_22_224911_alter_private_messages_table.php on line 20