Cannot deploy River application on HANA Cloud instance: missing privileges

Hello, everybody!

I'm trying to develop simple River application and I'd like to deploy and test it on HANA Cloud instance. I created simple River app in SAP HANA Studio (ver.1.80.3) and then made following steps:

1. Open db-tunnel to database schema on HANA Cloud
2. Create new system in Systems view of IDE with settings from db-tunnel. Connection was successful, I can see tables and table data of specified schema.
3. Then I tried to share my project in Repository Workspace and received error message "You are not authorized to execute this action; you don't have the required privileges".

What else should I do to perform deployment? Did I miss something?

Sorry if my question is rookie-typed.

Thanks in advance.