trait "laravel\scout\searchable" not found

why is it happening in my app?

when i use "laravel scout" i have problem "traits "laravel\scout\searchable" not found " but all configuration to use "laravel scout" i think i have done like add =

use Laravel\Scout\Searchable; use Searchable, public function toSearchableArray() { return [ 'name' => $this->name, 'desc' => $this->desc, ]; } on data models as well as adding SCOUT_DRIVER=database on ENV

this happened while i was hosting my app. please help