401 error accessing admin's Controller under /admin/ directory

In Laravel 5.8 app using tymon/jwt-auth 1.0.0 I make backend rest api and I want to move all admin's controls directory, so I created Controller with command

php artisan make:controller API/Admin/SkillController --resource

which has :

<?php

namespace App\Http\Controllers\API\Admin;

use Auth;
use DB;
use Validator;
use App\User;

use App\library\CheckValueType;
use App\Settings;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Skill;
use App\Http\Resources\Admin\Skill as SkillResource;
use App\Http\Traits\funcsTrait;


class SkillController extends Controller
{
    use funcsTrait;

    private $requestData;


    public function __construct()
    {
        $this->middleware('jwt.auth', ['except' => []]);
        $request           = request();
        $this->requestData = $request->all();
    }
    ...

In routes/api.php :

Route::group(['middleware' => 'jwt.auth',  'prefix' => 'admin', 'as' => 'admin.'], function ($router) {
    Route::get('skills', 'API\Admin\SkillController@index');
    ...

}); // Route::group(['middleware' => 'jwt.auth',  'prefix' => 'admin', 'as' => 'admin.'], function ($router) {


Route::group(['middleware' => 'jwt.auth',  'prefix' => 'manager', 'as' => 'manager.'], function ($router) {
    Route::get('users_assigned_to_task/{task_id}', 'API\ManagerController@users_assigned_to_task');
    ...    

Also I have very similar app/Http/Controllers/API/ManagerController.php file( with routes defined above ) :

<?php

namespace App\Http\Controllers\API;

use Auth;
use DB;
use Validator;

use App\ActivityLog;
//use Illuminate\Support\Facades\Auth;
use Carbon\Carbon;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\User;
use App\Task;
use App\UserSkill;
use App\UsersGroups;
use App\Event;
use App\EventUser;
use App\TaskAssignedToUser;
use App\Http\Traits\funcsTrait;

class ManagerController extends Controller
{
    use funcsTrait;
    private $requestData;
, 
    public function __construct()
    {
        $this->middleware('jwt.auth', ['except' => []]);
        $request           = request();
        $this->requestData = $request->all();
    }
    ...

which works ok for me.

The only difference is that SkillController is under “/admin/” subdirectory, but I set it with namespace...

But setting all parameters in axios GET request I see 401 error : https://imgur.com/a/xFgRK17

What is wrong ?

via Chebli Mohamed