Does WEB API Work with CRM 2016 On premise Installation?

I need some help.

I have an on premise CRM 2016 installation. I have been trying to use the CRM sample programs in order to learn Web API.

In the asyncTask getWebAPIVersion()method I am having an issue with the line:

HttpResponseMessage RetrieveVersionResponse = await httpClient.SendAsync(RetrieveVersionRequest);

RetrieveVersionResponse is returing a StatusCode:500, Internal Server Error.

I did a step through test and in tracing the folder for the version I do not see that physical directory on the CRM server.

I don't know what is the issue and I am wondering if the issue is with the Web API and CRM 2016.

I would appreciate any assistance on this...Thanks