Target class [App\Http\Controllers\Admin\Request] does not exist. code example

Example 1: Target class [Barryvdh\Cors\HandleCors] does not exist.

#Add [Barryvdh\Cors\HandleCors] to $middlewareGroups in Kernel.php
'cors' => [
\Barryvdh\Cors\HandleCors::class,
],

Example 2: Target class [App\Http\Controllers\EmployeeController] does not exist.

[PagesController::class, 'index']