This error isn't caused by any code in particular. When navigating to the URL of a Laravel application that doesn't have storage permissions set right, the application with die and give you that error. I don't know how you configure permissions on a windows machine (I develop on Linux) but I know you have to set app/storage/ to writable before you can 'run' the application.
Your Storage directory doesn't have the right permissions on it. I know in Linux you have to do chmod -R 777 app/storage to allow access to it, so do the same to that directory on Windows.