simple example generates simulation engine Error

[csrabak]

Steps to reproduce

1. Open Oregano
2. Load simple.oregano (example which comes with Oregano)
3. Press F5

Expected behaviour

Voltage of source displayed

Actual behaviour

"Simulation engine Error" Reference value: 0.00000e+00

Configuration

Operating system:

cat /etc/os-release |grep PRETTY_NAME
"Ubuntu 20.04.4 LTS"

Versions

oregano --version
Oregano 0.84.41
ngspice --version
ngspice compiled from ngspice revision 31