Call to undefined method Illuminate\Database\Eloquent\Casts\Attribute::make() On Laravel 9

After trying to create an Accessor in Larvel 9 i get this error:Call to undefined method Illuminate\Database\Eloquent\Casts\Attribute::make().

My code:

<?php

namespace Modules\Protocol\Entities;

use Illuminate\Database\Eloquent\Casts\Attribute;
use DateTime;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Factories\HasFactory;

class Protocol extends Model
{
    use HasFactory;

    protected $fillable = ['document_type', 'description_id', 'subject', 'employee_name', 'date_recived_sent', 'sender_id', 'sender_document_ref', 'subId', 'userId', 'department_id'];
    
    protected $with = ['contact', 'department'];

    public function contact() {
        return $this->hasOne('Modules\Contact\Entities\Contact', 'id', 'sender_id');
    }

    public function department() {
        return $this->belongsTo('Modules\Department\Entities\Department', 'department_id', 'id');
    }
    /**
     * 
     *
     * @return \Illuminate\Database\Eloquent\Casts\Attribute
     */
    protected function PrettySRDate(): Attribute {
        return Attribute::make(
            get: fn () => (new DateTime($this->date_recived_sent))->format('d.m.Y')
        );
    }
    
    protected static function newFactory()
    {
        return \Modules\Protocol\Database\factories\ProtocolFactory::new();
    }
}