Example throws DPFServerException

Hi, I would like to use DPF for one of my tasks.

I have installed ansys-dpf- core version 0.8.1and tried the example according to the documentation

from ansys.dpf.core import Model
from ansys.dpf.core import examples
model = Model(examples.find_simple_bar())

But when I get to print line it raises this error: ansys.dpf.gate.errors.DPFServerException: ResultInfoProvider:2<-Data sources not defined

I have also tried to reference the rst to the model, but it gives me the same error.

Any idea what am I doing wrong?