I get BadMethodCallException Call to undefined method App\Models\User::identifiableAttribute() - laravel

Question

I get this error after clicking 'New Post' button the frontend of the app:
Posts view
Line from my log file:
[2020-09-27 14:41:03] local.ERROR: Call to undefined method App\Models\User::identifiableAttribute() {"exception":"[object] (BadMethodCallException(code: 0): Call to undefined method App\Models\User::identifiableAttribute() at C:\xampp\htdocs\backpack-demo\vendor\laravel\framework\src\Illuminate\Support\Traits\ForwardsCalls.php:50)
I am using Laravel 7 + Backpack CRDU generator
Posts Controller:
<?php
namespace App\Http\Controllers;
use App\Events\NewPost;
use App\Http\Requests\PostStoreRequest;
use App\Jobs\SyncMedia;
use App\Mail\ReviewPost;
use App\Models\Post;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Mail;
class PostController extends Controller
{
/**
* #param \Illuminate\Http\Request $request
* #return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
*/
public function index(Request $request)
{
$posts = Post::all();
return view('post.index', compact('posts'));
}
/**
* #param \App\Http\Requests\PostStoreRequest $request
* #return \Illuminate\Http\RedirectResponse
*/
public function store(PostStoreRequest $request)
{
$post = Post::create($request->validated());
Mail::to($post->author->email)->send(new ReviewPost($post));
SyncMedia::dispatch($post);
event(new NewPost($post));
$request->session()->flash('post.title', $post->title);
return redirect()->route('post.index');
}
}
Posts Model:
class Post extends Model
{
use CrudTrait;
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'title',
'content',
'published_at',
'author_id',
];
/**
* The attributes that should be cast to native types.
*
* #var array
*/
protected $casts = [
'id' => 'integer',
'author_id' => 'integer',
];
/**
* The attributes that should be mutated to dates.
*
* #var array
*/
protected $dates = [
'published_at',
];
public static function create(array $validated)
{
}
public function author()
{
return $this->belongsTo(User::class);
}
}
User model:
class User extends Authenticatable
{
use Notifiable;
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'name', 'email', 'password',
];
/**
* The attributes that should be hidden for arrays.
*
* #var array
*/
protected $hidden = [
'password', 'remember_token',
];
/**
* The attributes that should be cast to native types.
*
* #var array
*/
protected $casts = [
'email_verified_at' => 'datetime',
];
}

Answer 1

your have forgotten to use 'CrudTrait' in your User Model:
use Backpack\CRUD\app\Models\Traits\CrudTrait;
class User extends Authenticatable
{
use Notifiable,CrudTrait
.......
}