Message Class in BTP ABAP environment no display authorization

[Sadullah]

===========================================================

Diagnosis

You attempted to displaya Workbench object but have no display authorization.
You attempted to change a Workbench object, but have neither the change nor the display authorization.

System Response

Object display refused.

Procedure

The system uses the authorization object S_DEVELOP for Workbench objects, butyour user master record contains no authorization for S_DEVELOP.
If necessary, ask your system administrator to give you this authorization.
==================================================================
Hey experts,

I can not activate a message class in my BTP ABAP environment trial account. I'm getting above error message in Eclipse. 

I've seen a YouTube video that developer add a message class (26:28 mins) in trial account without any errors.

How can I add S_DEVELOP authorization object? Or what should I do?

Vielen Dank im Voraus.