ILicenseService not found when connecting to Kentico API from console app

Hi,

I'm trying to access Kentico from a console app but am getting the exception below. I've followed the documentation here https://docs.kentico.com/k9/integrating-3rd-party-systems/using-the-kentico-api-externally

I have a CMSConnectionString in my config file and am calling CMS.DataEngine.CMSApplication.Init()

Does anyone know what else I'm missing? It seems to be looking for an implementation of ILicenseService.

System.NotSupportedException: [ObjectFactory.CurrentObjectFactory]: Implementation for type 'ILicenseService' was not found, make sure that assembly with implementation is present in the bin folder of your application. If the assembly is present, the implementation must be registered by call to ObjectFactory