No rights for getTeacher() even when I can see the teacher in webUI

[ptC7H12]

Hi,

I'm getting this error: Unerwarteter Fehler: java.net.ConnectException: An unexpected exception occurred: {"jsonrpc":"2.0","id":"ID","error":{"message":"no right for getTeachers()","code":-8509}}

But in WebUi I can see all teachers:

What can be the issue here?