Could not get the reflection type for DbContext

Question

When scaffolding a controller in ASP Core 2.0 VS 2017 I get the following:

Could not get the reflection type for DbContext :

BE.Data.ApplicationDb

Answer 1

I get this error when I generate the EF model by Scaffold-DbContext command and this finished with warnings. Then firstable I correct the warnings of Scaffold-DbContext and then scaffold razor items works fine.