解决laravel9提示“Target *classController does not exist”问题

class RouteServiceProvider extends ServiceProvider
{
   .
   .
   .
   .
   .
   protected $namespace ='App\\Http\\Controllers';
  public  function boot()
   {
         $this->configureRateLimiting();
         $this->routes(function () {
            Route::middleware('api')
                ->prefix('api')
                ->namespace($this->namespace)
                ->group(base_path('routes/api.php'));
            Route::middleware('web')
            ->namespace($this->namespace)
            ->group(base_path('routes/web.php'));
        });
    }
}

<?php
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Route;
//use App\Http\Controllers\Api\CaptchasController;
Route::prefix('v1')
    ->name('api.v1.')
    ->namespace("Api")//添加命名空间
    ->group(function () {
         Route::middleware('throttle:'.
         config('api.rate_limits.sign'))
        ->group(function () {
            // Route::post('captchas', [CaptchasController::class, 'store'])->name('captchas.store'); ---原来的
            Route::post('captchas', 'CaptchasController@store')
            ->name('captchas.store');// 修改成这样即可
         });
        Route::middleware('throttle:' .config('api.rate_limits.access'))
                ->group(function () {
            });
    })