The remote server returned an error: (500) when pinging Zapier in a .NET Core app

Getting this error in a .NET Core web app? In this case we were trying to ping Zapier. Server Error in ‘/’ Application.The remote server returned an error: (500) Internal Server Error.Exception Details: System.Net.WebException: The remote server returned an error: (500) Internal Server Error.Stack Trace:[WebException: The remote server returned an error: (500) Internal Server Error.]System.Net.WebClient.OpenRead(Uri... » read more