Roles & Permissions question (issue with Laracast)

Following ACL in Laravel : Roles and permissions laracast, I am facing a big issue. I even tried on a new project with a 5.1 version and it's still not working as you can see below.

What am I doing wrong?

Here's my files, if someone can help me.

Here's what I do in tinker :

Psy Shell v0.7.2 (PHP 5.6.23 — cli) by Justin Hileman9m
>>> namespace App;
=> null
>>> $role = new Role;
=> App\Role {#736}
>>> $perm = new Permission;
=> App\Permission {#738}
>>> $role->where('name','admin')->first();
=> App\Role {#752
     id: 1,
     name: "admin",
     label: "Administrateur",
     created_at: "2016-09-02 15:56:02",
     updated_at: "2016-09-02 15:56:02",
   }
>>> $perm->where('name','users_edit')->first();
=> App\Permission {#753
     id: 1,
     name: "users_edit",
     label: "Edition des utilisateurs",
     created_at: "2016-09-02 15:56:02",
     updated_at: "2016-09-02 15:56:02",
   }
>>> $role->givePermissionTo($perm);
Illuminate\Database\QueryException with message 'SQLSTATE[HY000]: General error: 1364 Field 'name' doesn't have a default value (SQL: insert into `chr53_permissions`
(`updated_at`, `created_at`) values (2016-09-02 16:15:13, 2016-09-02 16:15:13))'

Here's my Role.php model:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Role extends Model
{
    //
    protected $table = 'roles';

    protected $fillable = [
        'name', 'label',
    ];

    public function permissions()
    {
        return $this->belongsToMany(Permission::class);
    }

    public function users() {
        return $this->belongsToMany(User::class);
    }

    public function givePermissionTo(Permission $permission)
    {
        return $this->permissions()->save($permission);
    }
}

Here's my Permission.php model:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Permission extends Model
{
    //
    protected $table = 'permissions';

    protected $fillable = [
        'name', 'label',
    ];

    public function roles() {
        return $this->belongsToMany(Roles::class);
    }

}

Here's my migration file :

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class RolesPermissionInit extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('roles', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('label')->nullable();
            $table->timestamps();
        });

        Schema::create('permissions', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('label')->nullable();
            $table->timestamps();
        });

        Schema::create('permission_role', function (Blueprint $table) {
            $table->integer('permission_id')->unsigned();
            $table->integer('role_id')->unsigned();

            $table->foreign('permission_id')->references('id')->on('permissions')->onDelete('cascade');
            $table->foreign('role_id')->references('id')->on('roles')->onDelete('cascade');

            $table->primary(['permission_id', 'role_id']);


        });

        Schema::create('role_user', function (Blueprint $table) {
            $table->integer('role_id')->unsigned();
            $table->integer('user_id')->unsigned();

            $table->foreign('role_id')->references('id')->on('roles')->onDelete('cascade');
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');

            $table->primary(['role_id', 'user_id']);
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('permission_role', function($table) {
            $table->dropForeign(['permission_id']);
            $table->dropForeign(['role_id']);
            $table->drop();
        });

        Schema::table('role_user', function($table) {
            $table->dropForeign(['role_id']);
            $table->dropForeign(['user_id']);
            $table->drop();
        });

        Schema::drop('roles');
        Schema::drop('permissions');
    }
}