Undefined property: Illuminate\Auth\Events\Auth::$guard only on Production Server and not on Homestead Server

I have a Laravel application running smoothly on a vagrant machine running the latest version of Homestead. I've integrated the AdLdap module to allow my application to talk to our in house Active Directory Server which also runs smoothly. At this point, my whole application is running on my test environment, exactly how I want it to without errors.

However, I have built a production server to run my application and have installed all required software packages to run Laravel 5. I have git pulled my project down and set all permissions accordingly. When I attempt to request from my new production Server via https://mydomain.com.au/api/v1/login, I get the following error:

Failed to login: Undefined property: Illuminate\Auth\Events\Login::$guard

As my test environment talks directly to the source code (and works), I'm assuming this has nothing to do with my code. I'm thinking it's more related to my Server setup.

Does anyone have any ideas as I don't seem to be able to find any solutions for this problem at all.

via Chebli Mohamed