River HelloWorld could not upload records

Hi all,

I've created a schema "riverwl", a package "riverwl", a role "riverwl$DevRole" and added it to my user.

In the package riverwl, I've created a script "helloworld.rdl":

@OData
application riverwl.helloworld {       entity Person {            key element name : String;            action greeting() : String {                 return 'Hello '+this.name;            }        }
}

After activating the rdl file, I try to Generate test data. But this gives the following message:

Also tried this but without succes:

River tutorial code works on cloud but not on premise?

Thanks in advance!

Kind regards,

Wouter