Thanks but figure out the issue. Needed to added :base() to pass to the BaseController
To my knowledge usually there is no need to add ":base() to pass to the BaseController." Can you tell us what you want to pass to BaseController and how you want to use it?
https://docs.microsoft.com/en-us/aspnet/core/web-api/?view=aspnetcore-5.0
not need to pass the base() you should check out this link.