Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in C:\AppServ\Apache\2.4.69\htdocs\isha_security\database\migrations\2023_10_31_121033_add_field_to_chemicals.php:7 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.69\htdocs\isha_security\database\migrations\2023_10_31_121033_add_field_to_chemicals.php on line 7