Data Source search not working with HANA calculation view in Business application studio (CAP )

Hello,

I have created a CAP project deployed in my BTP trial account using BAS. I have 2 tables (Header & Item) deployed under my CF space, and I can see the data preview as well, using the HANA DB explorer. Now I have created a Calculation view in the same project under db/src folder as below.

Now inside the calculation view, when I'm trying to add my tables inside a projection node, by pressing '+' button(add data source), i don't find my tables in the search list.

Network call:

Are there any npm dependencies to be installed or is it a limitation with trial account ?.

Please note, I have an active session with cf and DB is up and running.