Error CS1729: 'Sage.Platform.WebPortal.Binding.WebEntityListBindingSource' does not contain a constructor that takes 2 arguments

We are adding grid smart parts to the account details page, but we keep getting this error:

 

error CS1729: 'Sage.Platform.WebPortal.Binding.WebEntityListBindingSource' does not contain a constructor that takes 2 arguments

 

Does anyone know what causes this error and how to fix it?  I cannot find anything on the web about it.