- laravel framework upgrade frpm 7.x to 8. see also: https://laravel.com/docs/8.x/upgrade#assert-exact-json-method

- use  PHP7 null coalesce operator instead of laravel optional method
- change Breadcrumbs::register method to Bredcrumbs::for method
- composer updates

app/Models/Page.php

@@ -8,9 +8,11 @@ use App\Models\User;
 use Illuminate\Database\Eloquent\Model;
 use Astrotomic\Translatable\Contracts\Translatable as TranslatableContract;
 use Astrotomic\Translatable\Translatable;// use Dimsav\Translatable\Translatable;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 
 class Page extends Model implements TranslatableContract
 {
+    use HasFactory;
     use ModelTrait;
     use Translatable; // 2. To add translation methods