Laravel ohmybrew/laravel-shopify Client error

there

I am using laravel ohmybrew/laravel-shopify for creating a shopify app After installed the package i followed ohmybrew Documentation and did all the steps but in https://domainname/authenticate i got this error

Client error: `POST https://pad- 
ux.myshopify.com/admin/webhooks.json` resulted in a `422 
Unprocessable Entity` response: {"errors":{"topic":["Invalid 
topic specified. Topics allowed: app\/uninstalled, 
collections\/create, collections\/delete (truncated...)

I am very much thankful if you give me some solution.

via Chebli Mohamed