PhpStorm is not able to resolve the method of a parent class inside of child class. The method is definitely part of the parent class. Every class on this code basis has this problem.
Any ideas on how to fix this?
In your case which is laravel related problem you can use laravel-ide-helper
after installation checkout the usage
and also there is a phpstorm plugin named laravel
https://plugins.jetbrains.com/plugin/7532-laravel