laraship directory composer install error from nexmo/clien-core when running composer install

when I first run composer install and composer update I got  Conclusion: don't install nexmo/client-core 1.8.1   and when I try the app I got [2019-10-12 13:55:14] local.ERROR: Trait 'Cviebrock\EloquentSluggable\Sluggable' not found {"userId":4,"exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalErrorException(code: 1): Trait 'Cviebrock\\EloquentSluggable\\Sluggable' not found at /Users/user/Documents/projects/cyber/rumah/Corals/modules/Utility/Models/Address/Location.php:13)
[stacktrace]
#0 {main}
"}