error: "The version given was unknown or has no registered routes" with laravel 5.4

While typing the uri 'my_domain.com/v1/home' in the browser, i got the error with the details as below:

1. error:

```
{"message":"The version given was unknown or has no registered routes.","status_code":400,"debug":{"line":72,"file":"\/home\/vagrant\/Code\/yuanzihe\/vendor\/dingo\/api\/src\/Routing\/Adapter\/Laravel.php","class":"Dingo\\Api\\Exception\\UnknownVersionException","trace":["#0 \/home\/vagrant\/Code\/yuanzihe\/vendor\/dingo\/api\/src\/Routing\/Router.php(513): Dingo\\Api\\Routing\\Adapter\\Laravel->dispatch(Object(Dingo\\Api\\Http\\Request), 'v1')","#1 \/home\/vagrant\/Code\/yuanzihe\/vendor\/dingo\/api\/src\/Http\/Middleware\/Request.php(126): Dingo\\Api\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))","#2 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Pipeline\/Pipeline.php(114): Dingo\\Api\\Http\\Middleware\\Request->Dingo\\Api\\Http\\Middleware\\{closure}(Object(Dingo\\Api\\Http\\Request))","#3 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Foundation\/Http\/Middleware\/TransformsRequest.php(30): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))","#4 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Pipeline\/Pipeline.php(148): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))","#5 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Foundation\/Http\/Middleware\/TransformsRequest.php(30): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))","#6 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Pipeline\/Pipeline.php(148): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))","#7 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Foundation\/Http\/Middleware\/ValidatePostSize.php(27): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))","#8 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Pipeline\/Pipeline.php(148): Illuminate\\Foundation\\Http\\Middleware\\ValidatePostSize->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))","#9 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Foundation\/Http\/Middleware\/CheckForMaintenanceMode.php(46): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))","#10 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Pipeline\/Pipeline.php(148): Illuminate\\Foundation\\Http\\Middleware\\CheckForMaintenanceMode->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))","#11 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Pipeline\/Pipeline.php(102): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))","#12 \/home\/vagrant\/Code\/yuanzihe\/vendor\/dingo\/api\/src\/Http\/Middleware\/Request.php(127): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))","#13 \/home\/vagrant\/Code\/yuanzihe\/vendor\/dingo\/api\/src\/Http\/Middleware\/Request.php(103): Dingo\\Api\\Http\\Middleware\\Request->sendRequestThroughRouter(Object(Dingo\\Api\\Http\\Request))","#14 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Pipeline\/Pipeline.php(148): Dingo\\Api\\Http\\Middleware\\Request->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))","#15 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Routing\/Pipeline.php(53): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))","#16 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Pipeline\/Pipeline.php(102): Illuminate\\Routing\\Pipeline->Illuminate\\Routing\\{closure}(Object(Illuminate\\Http\\Request))","#17 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Foundation\/Http\/Kernel.php(149): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))","#18 \/home\/vagrant\/Code\/yuanzihe\/vendor\/laravel\/framework\/src\/Illuminate\/Foundation\/Http\/Kernel.php(116): Illuminate\\Foundation\\Http\\Kernel->sendRequestThroughRouter(Object(Illuminate\\Http\\Request))","#19 \/home\/vagrant\/Code\/yuanzihe\/public\/index.php(53): Illuminate\\Foundation\\Http\\Kernel->handle(Object(Illuminate\\Http\\Request))","#20 {main}"]}}
```

2. laravel details:

```
class RouteServiceProvider extends ServiceProvider {
protected $namespace = 'App\Http\Controllers';
protected $api_namespace = 'App\Http\Controllers\Api';

public function map()
{
$this->mapApiRoutes();
$this->mapWebRoutes();
}

protected function mapWebRoutes() {
Route::middleware('web')
->namespace($this->namespace)
->group(base_path('routes/web.php'));
}

protected function mapApiRoutes() {
$api = app('Dingo\Api\Routing\Router');
$api->version('v1', function ($api) {
require base_path('routes/api.php');
});
}
}
```

```
// api.php