Can't get detailed deleted with soft delete feature in Laravel 5.7

I'm using soft delete feature in laravel, it is ok when I load all data with Post::withTrashed()->get() method. But when I want to get the detailed information of the data using this query Post::withTrashed()->find($post)->get(), it throws me to 404 page. Please help.

I tried Post::onlyTrashed()->find($post)->get() too, but still the same.

I checked the routes file by directly echoing a Hello world string on it and does work normally.

via Chebli Mohamed