Simple Azure Functions 2.0 function: HTTPRequest querying CosmosDB collection via sql results in http status of 500 internal server error

Azure Function 2.0, app service plan previously, now trying out Azure Functions Premium plan.....it simply does not work. A simple deploy of about a dozen Azure Functions to the premium plan results in success when deploying from VS2017, no errors or issues, but when I try to run the http trigger function backed with a query of the cosmosdb collection, it does not work, complains of a Internal Server error and a 500. Another Azure Function, runs successfully in the portal but returns no data....when I run that very same function via its url in a web browser, it returns back the data in json that I would expect. Is there something I am missing? Are there updated nuget package level versions that I need for this to work?