Spatie Laravel Permission Assign a role did not work

I'm using laravel 8 with Jetstream, My site has users and this users are related to many intitutions, so here they have different roles inside the site, So I made a seeder where i create the Roles and also the User and the institutions, everything is fine, then in the blade view I use the directives @can to show and hide information to different roles but here is the problem because it does not show anything, despite of the fact i am logged in with an administrador user it does not show what it is supposed to show.

I must say that I'am not using the User model to relate the roles, instead of I'am usign the UserInstitution model, because here is the logic.

Here is mi model

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Spatie\Permission\Traits\HasRoles;

class UserInstitutions extends Model
{
    use HasFactory;
    use HasRoles;

    protected $primaryKey  = 'user_id';
    public $incrementing = false;
    protected $guard_name = 'web';

    public function user() {
        return $this->belongsTo(User::class);
    }

    public function institution() {
        return $this->belongsTo(Institution::class,'institution_id_f');
    }
}

The Seeder

<?php

namespace Database\Seeders;

use Illuminate\Database\Seeder;
use Spatie\Permission\Models\Permission;
use Spatie\Permission\Models\Role;

class RoleSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $admin = Role::create(['name' => 'Administrador']);
        $titular = Role::create(['name' => 'Titular']);
        $coor = Role::create(['name' => 'Coordinador']);
        $subcoor = Role::create(['name' => 'SubCoordinador']);
        $int = Role::create(['name' => 'Integrante']);

        Permission::create(['name' => 'home.dashboard']);

        Permission::create(['name' => 'dashboard']);
        Permission::create(['name' => 'institution.index']);
        Permission::create(['name' => 'institution.create']);
        Permission::create(['name' => 'institution.update']);
        Permission::create(['name' => 'institution.delete']);

        $admin->syncPermissions(Permission::all());
        $coor->givePermissionTo('institution.index');
        $coor->givePermissionTo('institution.create');
    }
}

The seeder where I assign the role

<?php

namespace Database\Seeders;

use App\Models\Institution;
use App\Models\User;
use App\Models\UserInstitutions;
use Illuminate\Database\Seeder;

class UserInstitutionSeeder extends Seeder
{
    public function run()
    {
        $institution = Institution::all()->random();
        $user = User::all()->random();

        UserInstitutions::create([
            'user_id' => $user->id,
            'institution_id_f' => $institution->id,
            'institution_id' => $institution->institution_id,
            'email' => '[email protected]',
            'landline_phone_number' => '74859632',
            'start_date' => now(),
            'active' => 'S',
        ])->assignRole('Administrador');

        UserInstitutions::factory(5)->create();
    }
}

The view where i use the @can directive

 @can('institution.create')
                <a href="{{ route('institution.create') }}" class="btn btn-success text-white">Nueva</a>
            @endcan