Edmx File is not showing Diagram for DB first approach

I have a Database , and I am proceeding with EF DB first approach .

Right click on Model folder
 --> select new item
 -->ADO.net Entity Data model. 
 then selecting the DB & finally clicking Finish.

After that I am not getting the Model Diagram of my DB. Not getting any Diagram for any of the tables. The Default view is ADO.net Entity Data model Designer

Where is the issue? EF version is latest Stable(6.1.3). enter image description here