@Yasas Kasthuriarachchi, please move this to the Technology (Infrastructure, Cloud, Integration, Dev Tools) section instead. He will have better luck finding someone that can answer his problem there since it relates to development (tools).

Hi @hhy38,

The error here is self-explanatory.
For you to develop a BizAPI, you need a handler.
The handlers are modeled and developed in the .serverpackage file.
Hence you are getting this error stating that, the developer studio is unable to find the Dener.serverpackage file inside your workspace.
First you need to develop and model the handler in Dener.serverpackage file and then reference it on your BizAPI.

Services Layer Development
Working with Server Packages

Cheers !
Dhananjaya.

Hi @ola.nissen thank you I have moved it to Technology forum.

Thank you.